A mud pump experimental device

Abstract

The present invention relates to the technical field of mud pumps, and specifically discloses a mud pump experimental device, comprising: a pump body experimental unit, which includes a mounting platform for fixing the mud pump to be tested; a mud supply unit, which is located at the input side of the mud pump and is used to convey mud to the mud pump; a mud reflux unit, which is located at the output side of the mud pump and is used to recover the mud pumped out of the mud pump and return it to the mud supply unit; the present invention intercepts solid particles through a separation disk, and adjusts the height of the separation disk according to a preset solid content parameter, thereby being able to accurately simulate the mud state with different solid particle contents; utilizing a heating tank and a stirring element, combined with a preset viscosity parameter, the viscosity of the mud can be quickly adjusted to achieve the configuration of muds with different viscosities; through the state adjustment of the slurry pumping element, the mud solid content simulation state and the mud viscosity simulation state can be flexibly switched, thereby meeting the testing requirements of the mud pump under various simulated working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of mud pumps, and more particularly to a mud pump experimental device. Background Art

[0002] Mud pump is an important fluid conveying equipment, widely used in oil drilling, geological exploration, mining, construction and other fields. Its main function is to realize the transportation of mud. In order to facilitate the testing and evaluation of the working performance of the mud pump, it is necessary to conduct experiments on the mud pump before it is put into use to test the operating status of the mud pump.

[0003] The difference in mud pump experimental data is highly correlated with the mud sample transported by the mud pump to be tested. The solid content and viscosity of the mud sample will affect the experimental accuracy of the mud pump during the experiment. However, existing mud pump experimental devices mostly use mud samples with a fixed ratio for single working condition testing, which is difficult to simulate the complex working conditions of various mud properties faced by the mud pump during actual operation, thereby affecting the accuracy of the mud pump experimental results and making it difficult to ensure the guiding role of the experimental data on the actual operating conditions of the mud pump. Summary of the Invention

[0004] In order to overcome the above technical problems, the present invention proposes a mud pump experimental device.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A mud pump experimental device, comprising:

[0007] A pump body test unit, which includes a mounting platform for fixing the mud pump to be tested, and a drive motor for driving the mud pump is also provided on the mounting platform;

[0008] A mud supply unit, located at the input side of the mud pump, is used to deliver mud to the mud pump and includes a heating tank for storing mud, wherein a stirring element is provided in the heating tank;

[0009] The mud reflux unit is located on the output side of the mud pump and is used to recover the mud pumped out by the mud pump and return it to the mud supply unit. It includes a recovery barrel and a separation plate that can be lifted and lowered in the recovery barrel. The separation plate is used to intercept solid particles in the mud. The separation plate divides the recovery barrel into a mud solid content simulation bin and a mud viscosity simulation bin distributed upper and lower. The separation plate is provided with a slurry pumping component that is connected to either the mud solid content simulation bin or the mud viscosity simulation bin.

[0010] As a further solution of the present invention: a plurality of filter meshes are distributed circumferentially on the separation disk, and a cover plate adapted to each filter mesh is rotatably mounted on the separation disk.

[0011] As a further solution of the present invention: the slurry pumping member includes a cylinder fixed coaxially with the separation disk, the upper end of the cylinder is provided with a plurality of upper slurry pumping ports connected to the slurry solid content simulation chamber, and the lower end of the cylinder is provided with a plurality of lower slurry pumping ports connected to the slurry viscosity simulation chamber;

[0012] In the vertical direction, the upper slurry pumping port and the lower slurry pumping port are staggered with each other; a switching member adapted to the upper slurry pumping port and the lower slurry pumping port is movably provided in the cylinder.

[0013] As a further solution of the present invention: the switching member includes a turntable rotatably arranged in the cylinder body, and a plurality of sealing sheets adapted to the upper and lower slurry extraction ports are circumferentially arranged on the turntable.

[0014] As a further solution of the present invention: a lifting cylinder for driving the separation plate is installed on the recovery barrel, and a plurality of guide bars are arranged circumferentially inside the recovery barrel, and the separation plate is slidably connected to the guide bars.

[0015] As a further solution of the present invention: a slurry return pipe is provided between the heating tank and the recovery barrel, a slurry pump connected to the slurry return pipe is installed in the heating tank, and a corrugated hose is connected between the end of the slurry return pipe close to the recovery barrel and the slurry extraction member;

[0016] The bottom of the heating tank is connected to the input end of the mud pump with a slurry inlet pipe, and the output end of the mud pump is connected to the recovery barrel with a slurry discharge pipe.

[0017] As a further solution of the present invention: the heating tank includes an outer shell, a jacket and an inner liner which are nested in sequence from the outside to the inside; an insulation chamber is formed between the outer shell and the jacket, and a heating chamber is formed between the jacket and the inner liner, a water inlet pipe is provided at the lower end of the heating chamber, and a water outlet pipe is provided at the upper end of the heating chamber.

[0018] As a further solution of the present invention: the stirring member includes a hollow rotating shaft rotatably installed in the heating tank, a stirring disk is provided at the lower end of the hollow rotating shaft, and a stirring motor for driving the hollow rotating shaft is installed on the top of the heating tank.

[0019] As a further solution of the present invention: a flexible spoiler bag is provided in the heating tank and is located below the stirring element. The flexible spoiler bag is fixed to the inner wall of the heating tank by a circumferentially distributed elastic band. A connecting disk is provided in the center of the flexible spoiler bag. A driving element for driving the connecting disk to and fro movement is provided in the heating tank. A plurality of stepped grooves are opened circumferentially on the connecting disk, and a one-way sealing plate is rotatably installed in the stepped groove.

[0020] As a further solution of the present invention: the driving member includes a piston rod fixed coaxially with the connecting disk, and the upper end of the piston rod is movably embedded in the hollow rotating shaft; an air bin is provided at the top of the heating tank, a sealing ring is provided at the connection between the air bin and the hollow rotating shaft, an air pipe is connected to the top of the air bin, and a plurality of through holes communicating with the interior of the air bin are opened on the hollow rotating shaft.

[0021] Beneficial effects of the present invention:

[0022] The present invention can realize dynamic simulation of various working conditions. By intercepting solid particles through a separation disk and adjusting the height of the separation disk according to preset solid content parameters, it can accurately simulate the mud state of different solid particle contents. This dynamic adjustment method allows rapid switching of muds with different solid contents during the experiment without the need for frequent replacement of mud samples, thereby improving the experimental efficiency. By utilizing the heating tank and the stirring element, combined with the preset viscosity parameters, the viscosity of the mud can be quickly adjusted to achieve the configuration of muds with different viscosities. By adjusting the state of the slurry pumping element, the mud solid content simulation state and the mud viscosity simulation state can be flexibly switched, thereby meeting the testing requirements under various simulation working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural diagram of the pump body experimental unit in the present invention;

[0026] Figure 3 Schematic diagram of the structure of the mud supply unit in the present invention;

[0027] Figure 4 Schematic diagram of the structure of the mud return unit in the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the recycling bin of the present invention;

[0029] Figure 6 It is a cross-sectional view of the separation plate and the slurry extraction member in the present invention;

[0030] Figure 7 is a three-dimensional schematic diagram of the separation plate in the present invention;

[0031] Figure 8 is a three-dimensional schematic diagram of the separation plate of the present invention from another perspective;

[0032] Figure 9 Schematic diagram of the structure of the switching element in the present invention;

[0033] Figure 10is a cross-sectional view of the heating tank of the present invention;

[0034] Figure 11 for Figure 10 Enlarged view of point A in the middle;

[0035] Figure 12 for Figure 10 Enlarged view of point B in the middle.

[0036] In the picture:

[0037] 100, pump body test unit; 110, mounting platform; 120, mud pump; 130, drive motor; 140, slurry inlet pipe; 150, slurry discharge pipe; 160, slurry return pipe;

[0038] 200, slurry supply unit; 210, heating tank; 211, outer shell; 212, jacket; 213, liner; 214, insulation chamber; 215, heating chamber; 216, water inlet pipe; 217, water outlet pipe; 220, stirring motor; 230, hollow shaft; 231, through hole; 240, stirring plate; 250, flexible spoiler bag; 251, elastic band; 252, connecting plate; 253, stepped notch; 254, one-way sealing plate; 255, piston rod; 260, air chamber; 261, sealing ring; 262, air pipe;

[0039] 300, mud return unit; 310, recovery barrel; 311, mud solid content simulation chamber; 312, mud viscosity simulation chamber; 313, guide bar; 320, separator plate; 321, filter screen; 330, slurry extraction part; 331, cylinder; 332, upper slurry extraction port; 333, lower slurry extraction port; 340, switching part; 341, turntable; 342, sealing plate; 350, corrugated hose; 360, cover plate; 370, lifting cylinder. DETAILED DESCRIPTION

[0040] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0041] See also Figure 1 , the present invention discloses a mud pump experimental device, including a pump body experimental unit 100, a mud supply unit 200 and a mud return unit 300;

[0042] See also Figure 2The pump body test unit 100 includes a mounting platform 110 for fixing the mud pump 120 to be tested, and a driving motor 130 for driving the mud pump 120 is also provided on the mounting platform 110;

[0043] See also Figure 3 The mud supply unit 200 is located at the input side of the mud pump 120 and is used to deliver mud to the mud pump 120. It includes a heating tank 210 for storing mud. A stirring element is provided in the heating tank 210.

[0044] See also Figure 4 and Figure 5 The mud return unit 300 is located at the output side of the mud pump 120 and is used to recover the mud pumped out by the mud pump 120 and return it to the mud supply unit 200. It includes a recovery barrel 310 and a separation plate 320 that is liftably arranged in the recovery barrel 310. The separation plate 320 is used to intercept solid particles in the mud. The separation plate 320 divides the recovery barrel 310 into a mud solid content simulation chamber 311 and a mud viscosity simulation chamber 312 distributed vertically. The separation plate 320 is provided with a slurry pumping member 330 that is connected to either the mud solid content simulation chamber 311 or the mud viscosity simulation chamber 312.

[0045] Specifically, when conducting the experiment of the mud pump 120, the mud pump 120 is fixedly mounted on the mounting platform 110 and connected to the drive motor 130. The drive motor 130 drives the mud pump 120 to operate. The mud pump 120 sucks mud from the mud supply unit 200 and then pumps the mud out into the recovery bucket 310, so as to simulate the actual working condition of the mud pump 120, thereby testing its performance and efficiency.

[0046] During the mud pump 120 test, the mud supply unit 200 and the mud return unit 300 cooperated to simulate the state of different mud properties, including the solid content and viscosity of the mud, so as to simulate different operating conditions of the mud pump 120. The separation disk 320 intercepted solid particles (such as sand, bentonite, etc.) in the mud entering the recovery barrel 310, so that the solid particles were always retained in the upper mud solid content simulation chamber 311. The mud with the solid particles filtered out was able to pass through the separation disk 320 and reach the mud viscosity simulation chamber 312.

[0047] When conducting a mud solid content simulation test, the separation plate 320 is adjusted to a corresponding height according to the preset mud solid content parameters, so that the ratio of solid particles to mud in the mud solid content simulation chamber 311 just reaches the corresponding mud solid content parameters, and then the separation plate 320 is closed to separate the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 from each other, and at the same time, the slurry pumping member 330 is switched to be connected only to the mud solid content simulation chamber 311, and the mud and solid particles in the mud solid content simulation chamber 311 are sucked into the heating tank 210 together through the slurry pumping member 330, and the mud and solid particle mixture in the heating tank 210 is fully stirred and dispersed by the stirring member to obtain mud with corresponding solid content; this is repeated, and a plurality of muds with different solid contents can be prepared according to the preset multiple sets of mud solid content parameters, thereby realizing the simulation of mud states with different solid contents;

[0048] When conducting a mud viscosity simulation test, the separation plate 320 is adjusted to a corresponding height according to the preset mud viscosity parameters, so that the mud capacity in the mud viscosity simulation chamber 312 reaches the set standard, and then the separation plate 320 is closed to separate the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 from each other, and at the same time, the slurry extraction member 330 is switched to be connected only to the mud viscosity simulation chamber 312, and the mud in the mud viscosity simulation chamber 312 is sucked into the heating tank 210 through the slurry extraction member 330. During the slurry extraction process, the separation plate 320 is synchronously lowered until the mud in the mud viscosity simulation chamber 312 is completely extracted; the mud in the heating tank 210 is fully stirred and dispersed by the stirring member, and the internal mud is heated by the heating tank 210 until the viscosity of the mud reaches the preset mud viscosity parameters; this is repeated, and a variety of muds with different viscosities can be prepared according to the preset multiple sets of mud viscosity parameters, thereby realizing the simulation of mud states with different viscosities.

[0049] The present invention can realize dynamic simulation of various working conditions. By intercepting solid particles through the separation disk 320 and adjusting the height of the separation disk 320 according to the preset solid content parameters, it can accurately simulate the mud state with different solid particle contents. This dynamic adjustment method allows rapid switching of muds with different solid contents during the experiment without the need to frequently replace mud samples, thereby improving the experimental efficiency; using the heating tank 210 and the stirring element, combined with the preset viscosity parameters, the viscosity of the mud can be quickly adjusted to achieve the configuration of muds with different viscosities; through the state adjustment of the slurry extraction element 330, the mud solid content simulation state and the mud viscosity simulation state can be flexibly switched, thereby meeting the testing requirements under various simulation working conditions.

[0050] It should be noted that the above-mentioned preset mud solid content parameters and mud viscosity parameters can be flexibly set according to experimental requirements; among them, the adjustment position of the separation plate 320 is also mapped to the mud solid content parameters and mud viscosity parameters; the heating temperature of the mud by the heating tank 210 is also mapped to the mud viscosity parameters.

[0051] In addition, the experimental testing and performance evaluation of the mud pump 120 mainly include performance testing and reliability testing; the performance testing mainly involves flow and pressure testing, that is, by installing flow meters and pressure sensors, measuring the flow and pressure output of the mud pump 120 under different working conditions, and evaluating whether it meets the design requirements; efficiency testing, that is, calculating the mechanical efficiency and volumetric efficiency of the mud pump 120, and analyzing its energy conversion efficiency; and power testing, that is, measuring the input power of the drive motor 130, and evaluating the energy consumption of the mud pump 120 under different loads; and reliability testing mainly involves durability testing, that is, through long-term operation experiments, evaluating the reliability and durability of the mud pump 120 under continuous working conditions; fatigue testing, that is, simulating frequent start-stop and pressure fluctuations in actual working conditions, testing the fatigue strength of the pump body and key components; and wear testing, that is, studying the wear of solid particles in the mud on the pump body, plunger, seals and other components, and evaluating their service life.

[0052] In one embodiment, see Figure 6 In order to achieve the interception of solid particles by the separator 320 and the separation of the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312, a plurality of filter sheets 321 are distributed circumferentially on the separator 320. The aperture of the filter sheets 321 can intercept solid particles and allow the mud to pass smoothly. A cover plate 360 ​​adapted to each filter sheet 321 is rotatably mounted on the separator 320.

[0053] Specifically, when adjusting the position of the separator plate 320, the cover plate 360 ​​is rotated so that the cover plate 360 ​​and the filter screens 321 are staggered with each other to facilitate smooth passage of the mud through the filter screens 321. Thus, the space between the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 is adjusted by using the separator plate 320.

[0054] After the separation disk 320 is adjusted to the corresponding position, the cover plate 360 ​​is rotated so that the cover plate 360 ​​covers each filter screen 321, thereby separating the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312, and preventing the mud between the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 from flowing into each other and affecting the mud simulation state.

[0055] Further, see Figure 4 and Figure 5In order to adjust the height of the separation plate 320, a lifting cylinder 370 for driving the separation plate 320 is installed on the recovery barrel 310. A plurality of guide bars 313 are provided on the circumference of the recovery barrel 310. The separation plate 320 is slidably connected to the guide bars 313.

[0056] By driving the separation plate 320 through the lifting cylinder 370 , the separation plate 320 can be driven to move up and down and slide along the guide bar 313 in the vertical direction, thereby achieving height adjustment of the separation plate 320 .

[0057] For further information, see Figure 6 、 Figure 7 and Figure 8 The slurry pumping member 330 includes a cylinder 331 coaxially fixed to the separation plate 320. The upper end of the cylinder 331 is provided with a plurality of upper slurry pumping ports 332 connected to the mud solid content simulation chamber 311, and the lower end of the cylinder 331 is provided with a plurality of lower slurry pumping ports 333 connected to the mud viscosity simulation chamber 312. In the vertical direction, the upper slurry pumping ports 332 and the lower slurry pumping ports 333 are staggered with each other.

[0058] See also Figure 5 A switching member 340 adapted to the upper slurry pumping port 332 and the lower slurry pumping port 333 is movably provided in the cylinder 331;

[0059] Specifically, when performing a mud solid content simulation test, the state of the slurry pumping member 330 is switched by the switching member 340, so that the upper slurry pumping port 332 is connected and the lower slurry pumping port 333 is blocked, so that the mud mixed with solid particles in the mud solid content simulation chamber 311 enters the slurry pumping member 330 through the upper slurry pumping port 332, so that the solid particles and mud in the mud solid content simulation chamber 311 are sucked into the heating tank 210;

[0060] When conducting a mud viscosity simulation test, the state of the slurry pumping component 330 is switched through the switching component 340, so that the upper slurry pumping port 332 is blocked and the lower slurry pumping port 333 is connected, so that the mud in the mud viscosity simulation chamber 312 enters the slurry pumping component 330 through the lower slurry pumping port 333, so as to suck the mud in the mud viscosity simulation chamber 312 into the heating tank 210.

[0061] It should be noted that, through the coaxially fixed cylinder 331 and the switching member 340, combined with the staggered upper slurry extraction port 332 and the lower slurry extraction port 333, precise switching and extraction of mud in different bins are achieved, so that the mud containing solid particles or the mud with solid particles filtered out can be quickly and accurately selected for extraction without the need for additional pipeline switching or complicated operations; the switching member 340 is adapted to the upper slurry extraction port 332 and the lower slurry extraction port 333. Since the upper slurry extraction port 332 and the lower slurry extraction port 333 are staggered from each other in the vertical direction, and the switching member 340 is used to achieve blocking and conduction, it is ensured that the two muds with different characteristics will not mix with each other, and the mud that does not need to be extracted can be effectively blocked during the switching process, thereby ensuring the accuracy and reliability of the experimental data.

[0062] Accordingly, see Figure 9 The switching member 340 includes a turntable 341 rotatably disposed in the cylinder 331 , and a plurality of sealing pieces 342 adapted to the upper slurry pumping port 332 and the lower slurry pumping port 333 are circumferentially disposed on the turntable 341 ;

[0063] Specifically, the sealing piece 342 is driven to rotate by the turntable 341. When the mud solid content simulation test is performed, the sealing piece 342 is rotated to close the corresponding lower slurry pumping port 333. At this time, the sealing piece 342 is just staggered with the upper slurry pumping port 332, thereby closing the lower slurry pumping port 333 while maintaining the conduction of the upper slurry pumping port 332; when the mud viscosity simulation test is performed, the sealing piece 342 is rotated to close the corresponding upper slurry pumping port 332. At this time, the sealing piece 342 is just staggered with the lower slurry pumping port 333, thereby closing the upper slurry pumping port 332 while maintaining the conduction of the lower slurry pumping port 333;

[0064] It is worth noting that the design of the sealing piece 342 ensures that the upper slurry pumping port 332 and the lower slurry pumping port 333 always maintain a mutually exclusive state during the switching process, that is, when one is turned on, the other must be closed, ensuring the precise control of the mud flow direction, avoiding mud mixing due to misoperation, and ensuring the repeatability and consistency of each switching, thereby providing a guarantee for the accuracy and reliability of the experimental data.

[0065] It should be noted that the driving method of the cover plate 360 ​​and the turntable 341 is not limited and can be driven by components such as a motor or a cylinder push rod, which belongs to the existing technology and will not be specifically explained in this embodiment.

[0066] Also, see Figure 3 and Figure 4 In order to achieve smooth slurry return, a slurry return pipe 160 is provided between the heating tank 210 and the recovery barrel 310. A slurry pump (not shown in the figure) connected to the slurry return pipe 160 is installed in the heating tank 210. A corrugated hose 350 is connected between the end of the slurry return pipe 160 close to the recovery barrel 310 and the slurry extraction member 330.

[0067] Taking into account that the distribution position of the separation plate 320 in the recovery barrel 310 is different under different mud characteristic simulation conditions, the elasticity of the corrugated hose 350 can be used to compensate for the height of the separation plate 320 so that the mud in the recovery barrel 310 can always flow back smoothly to the heating tank 210.

[0068] In yet another embodiment, see Figure 1 and Figure 2 The bottom of the heating tank 210 is connected to the input end of the mud pump 120 via a slurry inlet pipe 140 , and the output end of the mud pump 120 is connected to the recovery barrel 310 via a slurry discharge pipe 150 ;

[0069] The mud configured in the heating tank 210 enters the mud pump 120 through the slurry inlet pipe 140, and then the mud pump 120 pumps the sucked mud out from the slurry discharge pipe 150 to the recovery barrel 310. The mud redistributed by the separation plate 320 flows back to the heating tank 210 again through the slurry return pipe 160, thereby realizing the recycling of the mud.

[0070] Further, see Figure 10 The heating tank 210 includes an outer shell 211, a jacket 212, and an inner liner 213, which are nested in sequence from the outside to the inside; a heat preservation chamber 214 is formed between the outer shell 211 and the jacket 212, and a heating chamber 215 is formed between the jacket 212 and the inner liner 213. A water inlet pipe 216 is provided at the lower end of the heating chamber 215, and a water outlet pipe 217 is provided at the upper end of the heating chamber 215;

[0071] When the mud in the heating tank 210 needs to be heated to change the viscosity of the mud, hot water is introduced into the heating chamber 215 from the water inlet pipe 216. The hot water flows from bottom to top, thereby heating the mud in the inner tank 213. The cold water after absorbing the heat flows out from the water outlet pipe 217. The insulation chamber 214 isolates the jacket 212 and the inner tank 213 from the outside, thereby keeping the inner tank 213 warm, avoiding internal heat loss, and effectively improving the heating efficiency.

[0072] For further information, see Figure 10 The stirring member includes a hollow rotating shaft 230 rotatably mounted in the heating tank 210, a stirring disc 240 is provided at the lower end of the hollow rotating shaft 230, and a stirring motor 220 for driving the hollow rotating shaft 230 is installed on the top of the heating tank 210;

[0073] Specifically, after the mud flows back into the heating tank 210, the hollow shaft 230 is driven to rotate by the stirring motor 220, thereby driving the stirring disk 240 to stir and disperse the mud circumferentially, so as to make the mud composition uniform and ensure the accuracy of the experimental results.

[0074] Considering that the stirring disc 240 only stirs the mud in the circumferential direction, some components with higher density in the mud are prone to sedimentation during the stirring process. In particular, when conducting a simulation test of the mud solid content, the solid particles in the mud are very likely to settle and cause the mud to stratify. This can easily cause a large difference in the state of the mud entering the mud pump 120 in the same batch, thereby affecting the accuracy of the experimental test results. For this reason, please refer to Figure 10 and Figure 11 The heating tank 210 is provided with a flexible spoiler bag 250 located below the stirring element. The flexible spoiler bag 250 is fixed to the inner wall of the heating tank 210 by a circumferentially distributed elastic band 251. A connecting disk 252 is provided at the center of the flexible spoiler bag 250. A driving member for driving the connecting disk 252 to move up and down is provided in the heating tank 210. A plurality of stepped notches 253 are opened circumferentially on the connecting disk 252, and a one-way sealing plate 254 is rotatably installed in the stepped notch 253.

[0075] Specifically, while the stirring member is stirring and dispersing the mud circumferentially, the driving member drives the connecting disk 252 at the center of the flexible spoiler bag 250 to move up and down periodically; when the connecting disk 252 drops, the one-way sealing plate 254 is passively flipped upward to open, thereby making the stepped notch 253 conductive, and the mud below the flexible spoiler bag 250 flows upward through the stepped notch 253 into the space above the flexible spoiler bag 250; when the connecting disk 252 rises, the one-way sealing plate 254 is passively flipped downward to close, thereby blocking the stepped notch 253, and the center of the flexible spoiler bag 250 As the connecting plate 252 rises, the area gradually turns upward and bulges into a conical state, so that the mud contained above the flexible spoiler bag 250 is discharged outward along the inclined cone surface, and then the mud falls again from the annular gap between the outer edge of the flexible spoiler bag 250 and the inner wall of the heating tank 210; this reciprocating process can be used to utilize the flexible spoiler bag 250 that shakes up and down to capture the mud at the center of the bottom layer of the heating tank 210 and lift it to a certain height and then discharge it outward circumferentially, thereby realizing periodic dispersion of the mud in the axial and radial directions, and avoiding stratification of the mud due to sedimentation.

[0076] It is worth noting that the flexible spoiler bag 250 realizes the periodic dispersion of the mud in the axial and radial directions through the periodic up and down movement of the connecting disk 252, combined with the opening and closing of the one-way sealing plate 254. This design can effectively capture the mud at the center of the bottom layer of the heating tank 210, and discharge it circumferentially outward after lifting it to a certain height, thereby avoiding the stratification of the mud due to sedimentation; the up and down shaking and conical flipping state of the flexible spoiler bag 250 form a dynamic flow circulation of the mud in the heating tank 210, further enhancing the stirring effect and ensuring the uniform distribution of solid particles in the mud; by preventing the mud from stratifying, the mud state of the mud entering the mud pump 120 in the same batch is ensured to be consistent, avoiding the deviation of the experimental test results caused by the difference in mud state, thereby improving the accuracy and repeatability of the experimental data. In the mud solid content simulation test, the uniform mud state is closer to the actual working condition, providing more reliable experimental conditions for the performance test of the mud pump 120;

[0077] In addition, the flexible spoiler bag 250 forms a cone shape when the connecting plate 252 rises, so that the mud is discharged outward along the inclined cone surface. This discharge method can effectively promote the mud to form a circulation in the heating tank 210, further enhancing the stirring effect.

[0078] See also Figure 10 、 Figure 11 and Figure 12 The driving member includes a piston rod 255 coaxially fixed to the connecting plate 252, and the upper end of the piston rod 255 is movably embedded in the hollow rotating shaft 230; an air chamber 260 is provided at the top of the heating tank 210, and a sealing ring 261 is provided at the connection between the air chamber 260 and the hollow rotating shaft 230. An air pipe 262 is connected to the top of the air chamber 260, and a plurality of through holes 231 communicating with the interior of the air chamber 260 are opened on the hollow rotating shaft 230;

[0079] Specifically, when the air chamber 260 is inflated through the air pipe 262, the gas in the air chamber 260 enters the hollow shaft 230 through the through hole 231, thereby pushing the piston rod 255 downward, driving the connecting plate 252 to synchronously descend to capture the bottom mud;

[0080] When the air chamber 260 is evacuated through the air pipe 262, under the action of negative pressure, the gas in the hollow rotating shaft 230 enters the air chamber 260 through the through hole 231, thereby driving the piston rod 255 upward along the hollow rotating shaft 230 to drive the connecting plate 252 to rise synchronously and throw the captured mud outward.

[0081] The above describes the specific implementation of this embodiment, but this embodiment is not limited to the above specific implementation. The above specific implementation is merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A mud pump experimental device, characterized in that: include: A pump body test unit (100) includes a mounting platform (110) for fixing a mud pump (120) to be tested, wherein a driving motor (130) for driving the mud pump (120) is also provided on the mounting platform (110); A mud supply unit (200) is located at the input side of the mud pump (120) and is used to deliver mud to the mud pump (120), and includes a heating tank (210) for storing mud, wherein a stirring element is provided in the heating tank (210); The mud return unit (300) is located at the output side of the mud pump (120) and is used to recover the mud pumped out by the mud pump (120) and return it to the mud supply unit (200). The mud return unit (300) includes a recovery barrel (310) and a separation plate (320) which is movably arranged in the recovery barrel (310). The separation plate (320) is used to intercept solid particles in the mud. The separation plate (320) separates the recovery barrel (310) into a mud solid content simulation chamber (311) and a mud viscosity simulation chamber (312) which are distributed in an upper and lower manner. The separation plate (320) is provided with a slurry pumping member (330) which is connected to either the mud solid content simulation chamber (311) or the mud viscosity simulation chamber (312).

2. A mud pump experimental device according to claim 1, characterized in that: A plurality of filter screens (321) are distributed circumferentially on the separation disk (320), and a cover plate (360) adapted to each filter screen (321) is rotatably mounted on the separation disk (320).

3. A mud pump experimental device according to claim 1, characterized in that: The slurry pumping member (330) comprises a cylinder (331) fixed coaxially with the separation plate (320); a plurality of upper slurry pumping ports (332) communicating with the slurry solid content simulation chamber (311) are provided at the upper end of the cylinder (331); a plurality of lower slurry pumping ports (333) communicating with the slurry viscosity simulation chamber (312) are provided at the lower end of the cylinder (331); In the vertical direction, the upper slurry pumping port (332) and the lower slurry pumping port (333) are staggered with each other; a switching member (340) adapted to the upper slurry pumping port (332) and the lower slurry pumping port (333) is movably provided in the cylinder (331).

4. A mud pump experimental device according to claim 3, characterized in that: The switching member (340) comprises a turntable (341) rotatably arranged in the cylinder (331), and a plurality of sealing sheets (342) adapted to the upper slurry extraction port (332) and the lower slurry extraction port (333) are circumferentially arranged on the turntable (341).

5. A mud pump experimental device according to claim 1, characterized in that: A lifting cylinder (370) for driving the separation plate (320) is installed on the recovery barrel (310). A plurality of guide bars (313) are provided in the circumferential direction of the recovery barrel (310). The separation plate (320) is slidably connected to the guide bars (313).

6. A mud pump experimental device according to claim 1, characterized in that: A slurry return pipe (160) is provided between the heating tank (210) and the recovery barrel (310); a slurry pump connected to the slurry return pipe (160) is installed in the heating tank (210); a corrugated hose (350) is connected between one end of the slurry return pipe (160) close to the recovery barrel (310) and the slurry extraction member (330); The bottom of the heating tank (210) is connected to the input end of the mud pump (120) via a slurry inlet pipe (140), and the output end of the mud pump (120) is connected to the recovery barrel (310) via a slurry discharge pipe (150).

7. A mud pump experimental device according to claim 1, characterized in that: The heating tank (210) comprises an outer shell (211), a jacket (212), and an inner liner (213) which are nested in sequence from the outside to the inside; a heat preservation chamber (214) is formed between the outer shell (211) and the jacket (212), and a heating chamber (215) is formed between the jacket (212) and the inner liner (213); a water inlet pipe (216) is provided at the lower end of the heating chamber (215), and a water outlet pipe (217) is provided at the upper end of the heating chamber (215).

8. A mud pump experimental device according to claim 1, characterized in that: The stirring member comprises a hollow rotating shaft (230) rotatably mounted in the heating tank (210), a stirring disc (240) is provided at the lower end of the hollow rotating shaft (230), and a stirring motor (220) for driving the hollow rotating shaft (230) is installed at the top of the heating tank (210).

9. A mud pump experimental device according to claim 8, characterized in that: A flexible spoiler bag (250) is provided in the heating tank (210) and is located below the stirring element. The flexible spoiler bag (250) is fixed to the inner wall of the heating tank (210) via a circumferentially distributed elastic band (251). A connecting disk (252) is provided at the center of the flexible spoiler bag (250). A driving member for driving the connecting disk (252) to move up and down is provided in the heating tank (210); a plurality of stepped notches (253) are provided circumferentially on the connecting disk (252), and a one-way sealing plate (254) is rotatably installed in the stepped notches (253).

10. A mud pump experimental device according to claim 9, characterized in that: The driving member comprises a piston rod (255) fixed coaxially with the connecting disk (252), and the upper end of the piston rod (255) is movably embedded in the hollow rotating shaft (230); an air chamber (260) is provided at the top of the heating tank (210), a sealing ring (261) is provided at the connection between the air chamber (260) and the hollow rotating shaft (230), an air pipe (262) is connected to the top of the air chamber (260), and a plurality of through holes (231) communicating with the interior of the air chamber (260) are opened on the hollow rotating shaft (230).

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