Slurry filtering device for core drilling

Abstract

The utility model relates to a mud filtering device for core drilling, which comprises a filtering shell capable of separating and outputting mud and large-particle impurities, and the input end of the filtering shell is connected with a stirring assembly capable of stirring and mixing the recycled mud. The outer wall of the stirring shell of the stirring assembly is further provided with a temperature control assembly capable of synchronously conducting cooling regulation and control on the slurry in a shell cavity, and the input end of the stirring assembly is provided with a liquid pre-adding dilution assembly capable of adding liquid into the directionally conveyed slurry for dilution so as to change the viscosity and component proportion of the slurry; and a rotary shoveling assembly capable of adjustably adding liquid in a compensation manner while rotating and turning over the material is also arranged in the stirring shell of the stirring assembly. According to the utility model, the recycled slurry can be diluted to reduce the filtering difficulty, and meanwhile, the slurry can be cooled to ensure that a drill bit can be effectively washed and cooled when the slurry is secondarily input into a drilling well.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling mud filtration equipment, and in particular to a mud filtration device for core drilling. Background Technology

[0002] Core drilling is a common exploration method in solid mineral geological exploration. A cylindrical drill bit and drilling tools break up the rock in a circular pattern at the bottom of the hole, leaving a columnar core at the center. The core is retrieved from the hole to study the geological and mineral conditions, hence the name core drilling. Drilling is the process of using mechanical equipment to drill holes into the formation from the surface. During drilling operations, a large amount of drilling mud is generated. Drilling mud generally refers to drilling fluid, which is a general term for various circulating fluids that meet the needs of drilling operations. Drilling fluid is the lifeblood of drilling, also known as borehole flushing fluid. Drilling fluids can be classified according to their composition into water, mud, clay-free flushing fluid, emulsions, foam, and compressed air, etc. During drilling, the drilling mud is discharged into the mud filtration device. Power is input from the power unit to drive the drilling pump, which pumps the mud to the bottom of the well. The mud carries the rock cuttings broken off at the bottom of the well and flows through the annular space between the drill pipe and the well wall back to the surface. After the rock fragments are removed by filtration, the mud is pumped back to the bottom of the well for repeated circulation, creating a good working environment for the drill bit at the bottom of the well.

[0003] Currently, in order to filter out large particles such as gravel in drilling mud, mud filtration equipment is usually installed in the mud recovery system to ensure that the drilling mud returned to the drilling pump has a small fineness, so as to reduce the risk of wear on the drill bit and blockage of the flushing channel when the mud is used as the drill bit flushing fluid. For example, patent document with application number CN202420245086.3 discloses a drilling mud filtration device, including a filter box; an inlet pipe, the top of which is fixedly sleeved; an outlet pipe, the bottom of which is fixedly sleeved; a filtration mechanism, the inner cavity of which is equipped with a filtration mechanism; a shaking mechanism, the two sides of which are installed and connected to the filtration mechanism; and a waste port, one end of which is connected to the filtration mechanism. The mud is pumped to the inlet pipe by a mud pump and falls onto the filtration mechanism. The filtration mechanism shakes back and forth to facilitate mud distribution and filtration, improving the filtration rate. Impurities are shaken off by the shaking mechanism and automatically fall out of the waste port. After final filtration, the mud falls to the bottom of the filter box and flows back to the well through the outlet pipe and a circulation pump, eliminating the need for work stoppage for cleaning. While this filtration device can achieve continuous filtration of drilling mud to ensure filtration efficiency and effectiveness, it becomes difficult to filter mud with high viscosity, and the filtration efficiency cannot be guaranteed. Mud mixed with large particles of impurities easily accumulates on the filter screen, making it impossible to quickly and effectively separate impurities. Furthermore, due to the hot and dry rock geological factors and the frictional heat generated by the drill bit during drilling, the temperature of the drilling mud discharged from the well is high. Existing mud filtration equipment cannot cool the mud, and the mud input to the well is also at a high temperature, which cannot effectively flush and cool the drill bit, resulting in a risk of continuous increase in drill bit temperature. High-temperature mud can also shorten the life of sealing parts such as rubber components in the drilling system, increasing equipment maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a mud filtration device for core drilling that can dilute recovered mud to reduce filtration difficulty, while also cooling the mud to ensure effective flushing and cooling of the drill bit during secondary drilling. This addresses the problems of existing mud filtration equipment being unable to dilute viscous mud, resulting in high-viscosity mud that cannot be effectively filtered, easily accumulating on the filter screen and affecting filtration efficiency. Furthermore, existing mud filtration equipment cannot cool the mud, leading to high mud temperatures that cannot effectively flush and cool the drill bit, and high-temperature mud accelerates the aging of rubber components in the drilling system, increasing maintenance costs.

[0005] The technical solution adopted by this utility model is as follows: a mud filtration device for core drilling, comprising a filter shell capable of separating and outputting mud from large particulate impurities; a stirring component capable of mixing the recovered mud connected to the input end of the filter shell; a temperature control component capable of simultaneously cooling and regulating the mud in the shell cavity is also provided on the outer wall of the stirring shell of the stirring component; a pre-liquid dilution component capable of adding liquid to the directionally conveyed mud to change the mud viscosity and component ratio; and a rotary shovel component capable of adjustable compensation liquid addition while rotating and turning the material inside the stirring shell of the stirring component.

[0006] According to a preferred embodiment, a cover plate is fastened to the top of the stirring shell, and a plurality of stirring shafts capable of extending into the stirring shell are rotatably inserted into the cover plate in a circumferentially spaced manner. Furthermore, a stirring drive mechanism capable of simultaneously driving the plurality of stirring shafts to rotate is provided on the top surface of the cover plate.

[0007] According to a preferred embodiment, an inlet for inputting mud and an outlet for outputting mud are staggered and inserted on both sides of the mixing shell, wherein the inlet is connected to the output end of the pre-liquid dilution component; and the outlet is connected to the input end of the filter shell.

[0008] According to a preferred embodiment, the stirring drive mechanism includes a stirring drive motor mounted at the center of the top surface of the cover plate, a drive gear mounted on the rotating shaft of the stirring drive motor, and a transmission gear fitted on the stirring shaft and meshing with the drive gear.

[0009] According to a preferred embodiment, a plurality of agitator rods are connected in a circumferential array on a portion of the shaft that extends into the cavity of the agitator housing.

[0010] According to a preferred embodiment, the temperature control assembly includes a heat exchange coil surrounding the outside of the stirring shell and heat exchange fins embedded in the tube body of the heat exchange coil and partially embedded in the shell wall of the stirring shell.

[0011] According to a preferred embodiment, the main return conveying pipe of the pre-liquid dilution assembly is connected to the inlet, and a liquid addition branch pipe is connected to the side of the main return conveying pipe in a multi-point insertion manner to dilute the recycled slurry conveyed in its cavity.

[0012] According to a preferred embodiment, the rotary shovel assembly includes a lower rotary drive motor, a transmission central shaft tube, shovel inclined plates, a drainage mechanism, and a drainage mechanism. The transmission central shaft tube is rotatably inserted into the bottom surface of the mixing housing and is also connected to the lower rotary drive motor mounted on the bottom surface of the mixing housing. Multiple shovel inclined plates are circumferentially spaced along the tube body of the transmission central shaft tube, which is located within the cavity of the mixing housing. A drainage mechanism communicating with the transmission central shaft tube is also provided on the surface of the shovel inclined plates. The drainage mechanism is connected to the lower axial end of the transmission central shaft tube outside the mixing housing.

[0013] According to a preferred embodiment, the liquid supply mechanism includes a liquid storage tank, a drain pipe, a pump, and a rotary joint. The drain pipe is inserted into the top surface of the liquid storage tank, and the pump is installed at the lower axial end of the drain pipe inside the liquid storage tank. The upper axial end of the drain pipe is connected to the port of the transmission shaft pipe through the rotary joint.

[0014] According to a preferred embodiment, the drainage mechanism includes a liquid guiding cavity strip inserted into the transmission central shaft tube and communicating with the lumen of the transmission central shaft tube, and drainage nozzles spaced apart on the liquid guiding cavity strip.

[0015] The beneficial effects of this utility model are:

[0016] The mixing component provided in this application further mixes the mud and diluent fed into the pre-dilution component, further reducing the mud viscosity. This allows the mud to pass through the filter screen more quickly when fed into the filter housing, improving the filtration rate and efficiency, and preventing excessive mud viscosity from hindering filtration. The rotary shovel component provided in this application scoops up low-water-content mud that may accumulate at the bottom of the mixing housing and replenishes the diluent, ensuring that the mud in the housing is sufficiently diluted to guarantee the effectiveness of mud dilution. The temperature control component provided in this application effectively reduces the temperature of the mud returned to the drilling system, preventing the high-temperature mud from affecting rubber components. It also ensures that the cooled mud carries away the working heat of the drill bit during flushing, effectively controlling the drill bit temperature and preventing excessively high temperatures during continuous operation, thus improving the lifespan of the drill bit and enhancing the durability of multiple components of the drilling system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred mud filtration device for core drilling proposed in this utility model;

[0018] Figure 2This is a partial planar schematic diagram of the drainage mechanism along the axial direction of the fluid guiding cavity strip of a preferred mud filtration device for core drilling proposed in this utility model.

[0019] List of reference numerals

[0020] 1: Filter shell; 2: Stirring assembly; 3: Temperature control assembly; 4: Pre-liquid dilution assembly; 5: Rotary shovel assembly; 21: Stirring shell; 22: Stirring shaft; 23: Cover plate; 24: Stirring drive mechanism; 211: Inlet; 212: Outlet; 221: Stirring auxiliary rod; 241: Stirring drive motor; 242: Drive gear; 243: Transmission gear; 31: Heat exchange coil; 32: Heat exchange plate; 41: Return material conveying main pipe; 42: Liquid addition branch pipe; 51: Lower rotary drive motor; 52: Transmission central shaft pipe; 53: Shovel inclined plate; 54: Drainage mechanism; 55: Liquid supply mechanism; 541: Liquid guiding cavity strip; 542: Drainage nozzle; 551: Liquid storage tank; 552: Drainage pipe; 553: Liquid pump; 554: Rotary hinge. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0023] The following is a detailed explanation with reference to the accompanying drawings.

[0024] Example 1

[0025] This application provides a mud filtration device for core drilling, which includes a filter shell 1, a stirring assembly 2, a temperature control assembly 3, a pre-liquid dilution assembly 4, and a rotary shovel assembly 5.

[0026] according to Figure 1-2In one specific embodiment, the filter shell 1, through the internal structure of a filter screen, can separate and output mud from large particulate impurities, allowing large particles such as gravel in the mud to be screened out, ensuring the fineness of the mud returned to the drilling system and preventing gravel from clogging the flow channels and causing excessive wear on the drill bit. A stirring assembly 2 is connected to the input end of the filter shell 1 to mix the recovered mud with additives such as diluents. A temperature control assembly 3 is also provided on the outer wall of the stirring shell 21 of the stirring assembly 2, which can simultaneously cool and regulate the mud within the shell cavity. A pre-liquid dilution assembly 4 is provided at the input end of the stirring assembly 2 to add liquid to the directionally conveyed mud to change its viscosity and composition ratio. A rotary shovel assembly 5 is also provided inside the stirring shell 21 of the stirring assembly 2, which can adjustably compensate for liquid addition while rotating and turning the material. The mixing component 2 provided in this application can further mix the mud and diluent input by the pre-dilution component 4, thereby further reducing the mud viscosity. This allows the mud to pass through the filter screen more quickly when input into the filter housing 1, improving the filtration rate and effect, and avoiding the problem of excessive mud viscosity hindering filtration. The rotary shovel component 5 provided in this application can scoop up the low-water-content mud at the bottom of the mixing housing 21 that may have settled, and replenish the diluent to ensure that the mud in the housing cavity is sufficiently diluted, thus ensuring the effectiveness of mud dilution. The temperature control component 3 provided in this application can effectively reduce the temperature of the mud returned to the drilling system, avoiding the impact of high-temperature mud on rubber parts, while ensuring that the cooled mud can remove the working heat of the drill bit during flushing, thereby effectively controlling the drill bit temperature and preventing the drill bit from overheating during continuous operation, which would affect its lifespan and improve the durability of multiple components of the drilling system.

[0027] Preferably, the filter shell 1 serves as the basic structure for mud filtration, primarily removing large particles such as gravel from the mud by setting up a filter screen or similar structure within the shell cavity. Specifically, the specific structure of the filter shell 1 provided in this application can be directly referenced to the drilling mud filtration device disclosed in the prior art patent application number CN202420245086.3. The filter shell 1 in this application directly refers to the entire mud filtration structure; that is, the shell of the filter shell 1 corresponds to the filter box in the prior art patent, and its shell is equipped with the same filtration mechanism, agitation mechanism, etc., as in the prior art patent, thereby achieving the separation of mud and large particles of impurities. Specifically, the top of the filter shell 1 is provided with an inlet pipe to receive the diluted mud output from the outlet 212 of the stirring shell 21; the bottom of the filter shell 1 is also provided with an outlet pipe, thereby returning the filtered mud that falls to the bottom of the filter shell 1 to the drilling well through the outlet pipe and the circulation pump. Specifically, the side of the filter shell 1 is provided with a waste outlet for diverting and discharging the large particles of impurities that have been screened out.

[0028] Preferably, the stirring assembly 2 includes a stirring shell 21, stirring shafts 22, a cover plate 23, and a stirring drive mechanism 24. Preferably, a cover plate 23 is fastened to the top of the stirring shell 21. Preferably, a plurality of stirring shafts 22, capable of extending into the stirring shell 21, are rotatably inserted into the cover plate 23 in a circumferentially spaced manner. Preferably, a stirring drive mechanism 24 capable of simultaneously driving the plurality of stirring shafts 22 to rotate is also provided on the top surface of the cover plate 23. Preferably, the stirring shafts 22 are connected to the cover plate 23 via bearing bodies embedded in the cover plate 23, so that the stirring shafts 22 inserted in the bearing bodies can rotate relative to the cover plate 23 about its axis. Specifically, multiple bearing bodies are embedded in the cover plate 23, with the outer ring of the bearing body and the cover plate 23 being relatively fixed through limiting snap-fit, welding, or other methods. The stirring shaft 22 is inserted into the inner ring of the bearing body with an interference fit, maintaining a relatively fixed connection between the stirring shaft 22 and the inner ring. Thus, the bearing body, based on the relative rotation of the inner and outer rings, allows the stirring shaft 22 to rotate relative to the cover plate 23. The bearing body configuration positions the stirring shaft 22, limiting its insertion depth and transmission stability. The stirring shaft 22 provided in this application can stir the slurry input into the stirring housing 21, allowing the added slurry diluent or other liquid materials to fully mix with the high-viscosity slurry, thereby diluting the slurry, reducing its viscosity, and facilitating its rapid passage through the filter mesh during subsequent filtration, achieving rapid screening of the slurry and large particles such as gravel. The stirring shaft 22 provided in this application can simultaneously agitate the mud in multiple areas, thereby accelerating the mixing speed and thoroughness of the mud with the added drilling fluid components and diluent, thus improving the compositional uniformity of the drilling mud. The stirring drive mechanism 24 provided in this application can simultaneously drive multiple stirring shafts 22, reducing the amount of drive module required, and lowering manufacturing and subsequent maintenance costs.

[0029] Preferably, an inlet 211 for inputting mud and an outlet 212 for outputting mud are staggered and inserted on both sides of the mixing shell 21. Preferably, the inlet 211 is connected to the output end of the pre-liquid dilution component 4; the outlet 212 is connected to the input end of the filter shell 1. Preferably, the inlet 211 is arranged close to the cover plate 23, and the outlet 212 is arranged away from the cover plate 23. The pipes defined by the inlet 211 and outlet 212 of the mixing shell 21 provided in this application are also provided with a one-way valve for limiting the unidirectional input of mud and a switching valve for controlling the opening and closing of the pipes, thereby controllably realizing the unidirectional controllable input and output of mud flow. Specifically, the one-way valve and the switching valve are directly installed on the pipes defined by the inlet 211 and outlet 212. The assembly of the valve body and the pipe is conventional prior art, and will not be described in detail in this application. Specifically, the inlet 211 and outlet 212 are tube structures that are directly inserted into the side wall of the stirring shell 21 and communicate with the shell cavity. Specifically, the tube structure is sealed and connected to the stirring shell 21 by welding, threaded connection or other means.

[0030] Preferably, a plurality of auxiliary stirring rods 221 are connected in a circumferential array to the portion of the stirring shaft 22 that extends into the cavity of the stirring housing 21. The auxiliary stirring rods 221 are arranged perpendicular to the axis of the stirring shaft 22. Specifically, the auxiliary stirring rods 221 can be assembled onto the shaft of the stirring shaft 22 by welding, screw-tube sleeve connection, or other methods. More preferably, the auxiliary stirring rods 221 can agitate the slurry within a certain range during the rotation of the stirring shaft 22, so as to effectively mix the slurry with liquid materials such as diluents.

[0031] Preferably, the stirring drive mechanism 24 includes a stirring drive motor 241 mounted at the center of the top surface of the cover plate 23, a drive gear 242 mounted on the rotating shaft of the stirring drive motor 241, and a transmission gear 243 fitted on the stirring shaft 22 and meshing with the drive gear 242, thereby enabling the stirring drive motor 241 to drive multiple stirring shafts 22 to rotate synchronously through the drive gear 242 and the transmission gear 243. Specifically, the stirring drive motor 241 can be selected as an LG-PCF-300 type high-torque stirring rotary servo motor, which can drive the stirring shaft 22 to rotate around the axis according to the required rotation degree. Preferably, the drive gear 242 and the transmission gear 243 can effectively transmit power, so that the stirring shaft 22 can follow the stirring drive motor 241 to rotate stably and uniformly, so as to effectively stir and mix the mud.

[0032] Preferably, the temperature control component 3 includes a heat exchange coil 31 surrounding the outside of the stirring shell 21 and heat exchange plates 32 embedded in the tube body of the heat exchange coil 31 and partially embedded in the shell wall of the stirring shell 21. Preferably, the input end and output end of the heat exchange coil 31 are connected to the output end and input end of an external coolant circulation cooling device, respectively. Specifically, the heat absorption end of the heat exchange plate 32 is embedded and attached to the side shell wall of the stirring shell 21, and the heat dissipation end of the heat exchange plate 32 is embedded and attached to the tube wall of the heat exchange coil 31. Preferably, the heat exchange plate 32 is a long strip structure with a spiral path composed of several semiconductor heat exchange unit plates. Specifically, the heat exchange plate 32 can be a semiconductor heat exchange plate of model LG-TEC2, which can effectively dissipate heat in high-temperature environments, has high heat dissipation efficiency, and is suitable for large temperature difference scenarios. Specifically, the two ends of the heat exchange fins 32 with thermally conductive protective shells are respectively connected to the heat exchange coil 31 and the stirring shell 21 by embedding, so that the heat-absorbing end of the heat exchange fins 32 contacts the shell cavity of the stirring shell 21, and its heat-releasing end contacts the tube cavity of the heat exchange coil 31. This allows the slurry to directly contact the heat exchange fins 32 for rapid heat transfer, while the heat-releasing end of the heat exchange fins 32 directly contacts the coolant in the heat exchange coil 31 to transfer the heat transferred by the heat exchange fins 32. Preferably, the external coolant circulation equipment can form a closed loop with the heat exchange coil 31 to utilize the circulating coolant for heat transfer. Specifically, the external coolant circulation equipment can be a high-flow-rate cooling circulation unit from the RXBH series.

[0033] Preferably, the return feed main pipe 41 of the pre-liquid dilution assembly 4 is connected to the inlet 211. More preferably, a liquid addition branch pipe 42 for diluting the recovered mud conveyed in its cavity is connected to the side of the return feed main pipe 41 by multiple insertion points. Specifically, the liquid addition branch pipe 42 is inserted obliquely into the side wall of the return feed main pipe 41 at an angle to it. Preferably, the input end of the return feed main pipe 41 is connected to the output end of the pump that recovers and transfers the drilling mud discharged from the well, so that the recovered mud can flow directionally along the flow channel of the cavity with a certain flow force. Preferably, the liquid addition branch pipe 42 is connected to the storage tank 551 through a liquid delivery pipeline, and a pressurized liquid pump for driving the directional delivery of liquid flow is provided in the liquid delivery pipeline. Specifically, the liquid injection branch pipe 42 is equipped with a one-way drain valve, allowing liquid materials such as diluent and drilling fluid replenishment to be unidirectionally input into the return feed main pipe 41, thereby initially mixing with the directional flow of mud to promote mixing between the mud and the replenishment fluid. This application provides multiple liquid injection branch pipes 42 to facilitate the injection of various materials into the mud. In particular, the liquid injection branch pipe 42 for injecting diluent can be connected to the storage tank 551 through a liquid delivery pipeline to achieve the supply of diluent.

[0034] Preferably, the rotary shovel assembly 5 includes a lower rotary drive motor 51, a transmission central shaft tube 52, shovel inclined plates 53, a drainage mechanism 54, and a drainage mechanism 55. Preferably, the transmission central shaft tube 52 is rotatably inserted into the bottom surface of the stirring shell 21, and it is also connected to the lower rotary drive motor 51 mounted on the bottom surface of the stirring shell 21. Preferably, multiple shovel inclined plates 53 are circumferentially spaced on the tube body of the transmission central shaft tube 52 located in the shell cavity of the stirring shell 21. Preferably, a drainage mechanism 54 communicating with the transmission central shaft tube 52 is also provided on the plate surface of the shovel inclined plates 53. Preferably, the axial lower end of the transmission central shaft tube 52 located outside the stirring shell 21 is connected to the drainage mechanism 55. Preferably, the installation method of the transmission central shaft tube 52 and its transmission structure with the lower rotary drive motor 51 can be directly referenced to the installation method and transmission structure of the stirring shaft 22 and the stirring drive mechanism 24. Specifically, the transmission shaft tube 52 is rotatably inserted into the bottom of the mixing shell 21 via a sealed bearing body. A sealing gasket is provided between the transmission shaft tube 52 and the mixing shell 21 to ensure the sealing of the rotatable insertion. Preferably, the rotating gear of the lower rotary drive motor 51 meshes with the transmission gear on the transmission shaft tube 52, enabling the lower rotary drive motor 51 to drive the transmission shaft tube 52 to rotate around its axis. This allows the shovel plate 53 to scoop up the high-viscosity slurry deposited at the bottom of the mixing shell 21 as it rotates with the transmission shaft tube 52, promoting the mixing of the slurry and the diluent. This reduces the viscosity of the slurry, allowing for effective and rapid filtration when it is fed into the mixing shell 21. Preferably, the lower rotary drive motor 51 can also be an LG-PCF-300 high-torque stirring rotary servo motor, which can set the rotation speed as needed to drive the transmission shaft tube 52 to rotate around its axis. The drainage mechanism 54 and the supply mechanism 55 provided in this application can cooperate with each other to inject a compensating diluent into the mud at the bottom while the shovel plate 53 scoops up the mud, so that the mud can be fully diluted and the viscosity of the mud can be effectively reduced.

[0035] Preferably, the drainage mechanism 54 includes a liquid-guiding cavity strip 541 inserted into the transmission central shaft tube 52 and communicating with the cavity of the transmission central shaft tube 52, and drainage nozzles 542 spaced apart and installed on the liquid-guiding cavity strip 541. Preferably, the open end of the liquid-guiding cavity strip 541 is inserted into the tube wall of the transmission central shaft tube 52 with an interference fit, and its joint can be sealed and reinforced by welding or other methods. Preferably, the drainage nozzle 542 can be a rotary cleaning nozzle of model IMM FRN54-100-Z, which has a built-in spring-driven one-way valve, and the backflow is blocked by a mechanical seal when the nozzle is closed; the rotary nozzle design can automatically remove surface deposits.

[0036] Preferably, the liquid supply mechanism 55 includes a liquid storage tank 551, a drain pipe 552, a pump 553, and a rotary joint 554. Preferably, the drain pipe 552 is inserted into the top surface of the liquid storage tank 551. More preferably, the pump 553 is installed at the lower axial end of the drain pipe 552 inside the liquid storage tank 551. Preferably, the upper axial end of the drain pipe 552 is connected to the port of the transmission shaft pipe 52 via the rotary joint 554, so that the pipeline formed by the three components remains sealed while the transmission shaft pipe 52 rotates, thereby effectively directionally delivering the liquid flow. Preferably, the pump 553 is an LG-TOE-65 type pressurized liquid transfer pump, which is capable of extracting and directionally delivering the diluent under conductive conditions. Preferably, the rotary joint is a conventional universal rotary pipe fitting. Its two ends are connected by a sleeve, clamp, or threaded connection to achieve pipe lumen communication between the two pipes and maintain relative rotation between the two pipes. The size and specifications of the rotary pipe fitting can be selected according to the actual pipe size to be assembled. As a conventional existing product, it will not be described in detail here.

[0037] Preferably, the electrical components involved in this application, such as the stirring drive motor 241, heat exchange plate 32, and lower rotation drive motor 51, are all electrically connected to the controller and power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0038] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0039] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A mud filtration device for core drilling, comprising a filter shell (1) capable of separating and outputting mud from large particulate impurities, characterized in that, A stirring assembly (2) capable of stirring and mixing the recovered mud is connected to the input end of the filter shell (1). A temperature control assembly (3) capable of simultaneously cooling and regulating the mud in the shell cavity is also provided on the outer wall of the stirring shell (21) of the stirring assembly (2). A pre-liquid dilution assembly (4) capable of adding liquid to dilute the directional conveyed mud to change the viscosity and composition ratio of the mud is provided at the input end of the stirring assembly (2). The stirring assembly (2) is further provided with a rotating shovel assembly (5) that can adjust the addition of liquid while rotating and turning the material.

2. A mud filter device for core drilling as claimed in claim 1, characterized in that, A cover plate (23) is fastened to the top of the stirring shell (21). Multiple stirring shafts (22) that can extend into the stirring shell (21) are rotatably inserted on the cover plate (23) in a circumferentially spaced manner. A stirring drive mechanism (24) that can simultaneously drive multiple stirring shafts (22) to rotate is also provided on the top surface of the cover plate (23).

3. A mud filter device for core drilling as claimed in claim 2, characterized in that, A mud inlet (211) and a mud outlet (212) are staggered and inserted on both sides of the mixing shell (21), wherein, The inlet (211) is connected to the output end of the pre-liquid dilution assembly (4); the outlet (212) is connected to the input end of the filter housing (1).

4. A mud filter device for core drilling as claimed in claim 3, characterized in that The stirring drive mechanism (24) includes a stirring drive motor (241) installed at the center of the top surface of the cover plate (23), a drive gear (242) installed on the rotating shaft of the stirring drive motor (241), and a transmission gear (243) fitted on the stirring shaft (22) and meshing with the drive gear (242).

5. A mud filter device for core drilling as claimed in claim 4, characterized in that, Several stirring rods (221) are connected to the part of the stirring shaft (22) that extends into the cavity of the stirring housing (21) in a circumferential array.

6. A mud filter device for core drilling as claimed in claim 5, characterized in that The temperature control assembly (3) includes a heat exchange coil (31) surrounding the outside of the stirring shell (21) and heat exchange plates (32) embedded in the tube body of the heat exchange coil (31) and partially embedded in the shell wall of the stirring shell (21).

7. A mud filter device for core drilling as claimed in claim 6, characterized in that The return conveying main pipe (41) of the pre-liquid dilution assembly (4) is connected to the inlet (211), and a liquid addition branch pipe (42) is connected to the side of the return conveying main pipe (41) in a multi-point insertion manner to dilute the recycled mud conveyed in its cavity.

8. A mud filter device for core drilling as claimed in claim 7, characterized in that The rotary shovel assembly (5) includes a lower rotary drive motor (51), a transmission central shaft tube (52), a shovel inclined plate (53), a liquid discharge mechanism (54), and a liquid supply mechanism (55), wherein, The transmission shaft tube (52) is rotatably inserted into the bottom surface of the stirring shell (21), and it is also connected to a lower rotation drive motor (51) mounted on the bottom surface of the stirring shell (21). On the tube body of the transmission shaft tube (52) placed in the cavity of the stirring shell (21), a plurality of shovel plates (53) are also circumferentially spaced. Furthermore, a draining mechanism (54) connected to the transmission shaft tube (52) is provided on the plate surface of the shovel plates (53). The transmission shaft tube (52) is located outside the stirring shell (21) and its axial lower end is connected to a liquid supply mechanism (55).

9. A mud filter device for core drilling as claimed in claim 8, characterized in that The liquid supply mechanism (55) includes a liquid storage tank (551), a drain pipe (552), a pump (553), and a rotary joint (554), wherein, A drain pipe (552) is inserted into the top surface of the liquid storage tank (551), and a pump (553) is provided at the lower axial end of the drain pipe (552) inside the liquid storage tank (551). The upper axial end of the drain pipe (552) is connected to the port of the transmission shaft pipe (52) via a rotating joint (554).

10. A mud filter device for core drilling as claimed in claim 9, characterized in that The drainage mechanism (54) includes a liquid guiding cavity strip (541) inserted into the transmission central shaft tube (52) and communicating with the lumen of the transmission central shaft tube (52), and drainage nozzles (542) spaced apart on the liquid guiding cavity strip (541).

Images