Slurry pump experimental device

Abstract

The invention relates to the technical field of slurry pumps, and particularly discloses a slurry pump experimental device, which comprises a pump body experimental unit, a slurry pump experimental unit and a slurry pump experimental unit, the slurry supply unit is located on the input side of the slurry pump and used for conveying slurry to the slurry pump; the slurry backflow unit is located on the output side of the slurry pump and used for recycling the slurry pumped out by the slurry pump and enabling the slurry to flow back to the slurry supply unit; solid particles are intercepted through the separation disc, the height of the separation disc is adjusted according to preset solid content parameters, and the states of slurry with different solid particle contents can be accurately simulated; the viscosity of the slurry can be quickly adjusted by utilizing the heating tank and the stirring piece in combination with preset viscosity parameters, so that the configuration of the slurry with different viscosities is realized; by adjusting the state of the slurry pumping piece, the slurry solid content simulation state and the slurry viscosity simulation state can be flexibly switched, so that the test requirements of the slurry pump under various simulation working conditions are met.

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. 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

[0003] In order to overcome the above technical problems, the present invention proposes a mud pump experimental device.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A mud pump experimental device, comprising: 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; 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; 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.

[0005] 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.

[0006] As a further solution of the present invention: The slurry pumping member includes a cylinder body coaxially fixed to the partition disk. A plurality of upper slurry pumping ports communicating with the slurry solid content simulation chamber are provided at the upper end of the cylinder body, and a plurality of lower slurry pumping ports communicating with the slurry viscosity simulation chamber are provided at the lower end of the cylinder body; In the vertical direction, the upper slurry pumping ports and the lower slurry pumping ports are staggered from each other; a switching member adapted to the upper slurry pumping ports and the lower slurry pumping ports is movably arranged in the cylinder body.

[0007] 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 plates adapted to the upper slurry pumping ports and the lower slurry pumping ports are circumferentially arranged on the turntable.

[0008] As a further solution of the present invention: A lifting cylinder for driving the partition disk is installed on the recovery barrel, and a plurality of guide strips are circumferentially arranged inside the recovery barrel. The partition disk is slidably connected to the guide strips.

[0009] As a further solution of the present invention: A return slurry pipe is arranged between the heating tank and the recovery barrel. A slurry pumping pump connected to the return slurry pipe is installed in the heating tank. A corrugated hose is connected between the end of the return slurry pipe close to the recovery barrel and the slurry pumping member; An inlet slurry pipe is connected between the bottom of the heating tank and the input end of the slurry pump, and a discharge slurry pipe is connected between the output end of the slurry pump and the recovery barrel.

[0010] As a further solution of the present invention: The heating tank includes a housing, a jacket and an inner tank nested with each other from outside to inside in sequence; a heat preservation cavity is formed between the housing and the jacket, a heating cavity is formed between the jacket and the inner tank, a water inlet pipe is arranged at the lower end of the heating cavity, and a water outlet pipe is arranged at the upper end of the heating cavity.

[0011] 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 arranged at the lower end of the hollow rotating shaft, and a stirring motor for driving the hollow rotating shaft is installed at the top of the heating tank.

[0012] As a further solution of the present invention: A flexible flow disturbing bag is arranged in the heating tank below the stirring member. The flexible flow disturbing bag is fixed to the inner wall of the heating tank by circumferentially distributed elastic bands. A connecting disk is arranged at the middle of the flexible flow disturbing bag. A driving member for driving the connecting disk to reciprocate up and down is arranged in the heating tank; a plurality of stepped notches are circumferentially opened on the connecting disk, and one-way sealing plates are rotatably installed in the stepped notches.

[0013] As a further solution of the present invention: The driving member includes a piston rod coaxially fixed to the connecting disc, and the upper end of the piston rod is movably embedded in the hollow rotating shaft; a gas chamber is provided at the top inside the heating tank, a sealing ring is provided at the connection between the gas chamber and the hollow rotating shaft, a trachea is connected to the top of the gas chamber, and a plurality of through holes communicating with the inside of the gas chamber are provided on the hollow rotating shaft.

[0014] Advantages of the present invention: The present invention can realize the dynamic simulation of various working conditions. By intercepting solid particles with the partition disc and adjusting the height of the partition disc according to the preset solid content parameter, it can accurately simulate the mud state with different solid particle contents. This dynamic adjustment method allows for the rapid switching of mud with different solid contents during the experiment, without the need to frequently replace mud samples, improving the experimental efficiency; by using the heating tank and the stirring member, combined with the preset viscosity parameter, it can quickly adjust the viscosity of the mud to achieve the configuration of mud with different viscosities; through the state adjustment of the slurry pumping member, it can flexibly switch between the simulated state of the mud solid content and the simulated state of the mud viscosity, thus meeting the test requirements under various simulation working conditions. Description of the drawings

[0015] The present invention will be further described below with reference to the drawings.

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the pump body experimental unit in the present invention; Figure 3 is a schematic structural diagram of the mud supply unit in the present invention; Figure 4 is a schematic structural diagram of the mud reflux unit in the present invention; Figure 5 is a schematic internal structure diagram of the recovery bucket in the present invention; Figure 6 is a cross-sectional view of the partition disc and the slurry pumping member in the present invention; Figure 7 is a three-dimensional schematic diagram of the partition disc in the present invention; Figure 8 is a three-dimensional schematic diagram of the partition disc from another perspective in the present invention; Figure 9 is a schematic structural diagram of the switching member in the present invention; Figure 10 is a cross-sectional view of the heating tank in the present invention; Figure 11 is Figure 10 the enlarged view at A in Figure 12 is Figure 10 the enlarged view at B in

[0017] In the figure: 100, Pump body experiment unit; 110, Installation table; 120, Mud pump; 130, Driving motor; 140, Feed slurry pipe; 150, Discharge slurry pipe; 160, Return slurry pipe; 200, Mud supply unit; 210, Heating tank; 211, Outer shell; 212, Jacket; 213, Inner tank; 214, Heat preservation cavity; 215, Heating cavity; 216, Water inlet pipe; 217, Water outlet pipe; 220, Stirring motor; 230, Hollow rotating shaft; 231, Through hole; 240, Stirring disc; 250, Flexible turbulence bag; 251, Elastic band; 252, Connection disc; 253, Step notch; 254, One-way sealing plate; 255, Piston rod; 260, Air chamber; 261, Sealing ring; 262, Air pipe; 300, Mud reflux unit; 310, Recovery barrel; 311, Mud solid content simulation bin; 312, Mud viscosity simulation bin; 313, Guide strip; 320, Partition disc; 321, Filter screen; 330, Slurry pumping part; 331, Cylinder body; 332, Upper slurry pumping port; 333, Lower slurry pumping port; 340, Switching part; 341, Turntable; 342, Sealing piece; 350, Corrugated hose; 360, Cover plate; 370, Lifting cylinder. Specific embodiments

[0018] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein, and the functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the content of this specification. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described for some examples can also be combined in other examples.

[0019] Please refer to Figure 1 , The present invention discloses a mud pump experiment device, including a pump body experiment unit 100, a mud supply unit 200, and a mud reflux unit 300; Please refer to Figure 2 , The pump body experiment unit 100 includes an installation table 110 for fixing the mud pump 120 to be tested, and a driving motor 130 for driving the mud pump 120 is further provided on the installation table 110; Please refer to Figure 3 , The mud supply unit 200 is located on the input side of the mud pump 120 and is used to convey mud to the mud pump 120, including a heating tank 210 for storing mud, and a stirring member is provided in the heating tank 210; Please refer to Figure 4 and Figure 5, the mud reflux unit 300 is located on the output side of the mud pump 120 and is used to recover and reflux the mud pumped out by the mud pump 120 to the mud supply unit 200. It includes a recovery barrel 310 and a partition plate 320 that is liftably arranged in the recovery barrel 310. The partition plate 320 is used to intercept solid particles in the mud. The partition plate 320 divides the inside of the recovery barrel 310 into a mud solid content simulation chamber 311 and a mud viscosity simulation chamber 312 that are distributed up and down. A slurry pumping member 330 that communicates with either the mud solid content simulation chamber 311 or the mud viscosity simulation chamber 312 is provided on the partition plate 320; Specifically, when conducting an experiment on the mud pump 120, the mud pump 120 is fixedly installed on the installation table 110 and connected to the drive motor 130. The mud pump 120 is driven to operate by the drive motor 130. The mud pump 120 sucks mud from the mud supply unit 200 and then pumps the mud into the recovery barrel 310 to simulate the actual working conditions of the mud pump 120, so as to test its performance and efficiency; During the experiment of the mud pump 120, through the mutual cooperation of the mud supply unit 200 and the mud reflux unit 300, the state simulation of different mud characteristics is realized, including the simulation of the solid content and viscosity of the mud, so as to conduct simulation tests on the mud pump 120 under different working conditions; the partition plate 320 intercepts solid particles (such as sand, bentonite, etc.) in the mud entering the recovery barrel 310, so that the solid particles always stay in the upper mud solid content simulation chamber 311, and the mud filtered from the solid particles can reach the mud viscosity simulation chamber 312 through the partition plate 320; When conducting the mud solid content simulation test, according to the preset mud solid content parameters, the partition plate 320 is adjusted to the corresponding height 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. Then the partition plate 320 is closed to separate the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 from each other. At the same time, the slurry pumping member 330 is switched to only communicate with the mud solid content simulation chamber 311. The slurry pumping member 330 sucks the mud and solid particles in the mud solid content simulation chamber 311 into the heating tank 210 together. The mixture of mud and solid particles in the heating tank 210 is fully stirred and dispersed by the stirring member, and the mud with the corresponding solid content can be obtained; repeating this way, multiple muds with different solid contents can be prepared corresponding to the preset multiple groups of mud solid content parameters, so as to realize the simulation of the mud state with different solid contents; When performing the mud viscosity simulation test, according to the preset mud viscosity parameters, the partition plate 320 is adjusted to the corresponding height so that the mud volume in the mud viscosity simulation chamber 312 reaches the set standard. Then the partition plate 320 is closed to separate the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 from each other. At the same time, the slurry pumping member 330 is switched to be only communicated with 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 pumping member 330. During the slurry pumping process, the partition plate 320 descends synchronously until the mud in the mud viscosity simulation chamber 312 is completely pumped out; the mud in the heating tank 210 is fully stirred and dispersed by the stirring member, and at the same time, the heating tank 210 is used to heat the internal mud until the viscosity of the mud reaches the preset mud viscosity parameters; repeating this way, various muds with different viscosities can be correspondingly prepared according to the preset multiple groups of mud viscosity parameters, so as to realize the simulation of mud states with different viscosities.

[0020] The present invention can realize the dynamic simulation of various working conditions. By intercepting solid particles with the partition plate 320 and adjusting the height of the partition plate 320 according to the preset solid content parameters, the mud state with different solid particle contents can be accurately simulated. This dynamic adjustment method allows for the rapid switching of muds with different solid contents during the experiment without frequently replacing mud samples, improving the experimental efficiency; by using the heating tank 210 and the stirring member, combined with the preset viscosity parameters, the viscosity of the mud can be quickly adjusted to realize the configuration of muds with different viscosities; through the state adjustment of the slurry pumping member 330, the flexible switching between the mud solid content simulation state and the mud viscosity simulation state can be achieved, so as to meet the test requirements under various simulation working conditions.

[0021] It should be noted that the above preset mud solid content parameters and mud viscosity parameters can be flexibly set according to the experimental requirements; among them, the adjustment position of the partition plate 320 is also mapped to the mud solid content parameters and mud viscosity parameters; the heating temperature of the heating tank 210 for the mud is also mapped to the mud viscosity parameters.

[0022] In addition, for the experimental tests and performance evaluations of the mud pump 120, they mainly include performance tests and reliability tests. Among them, the performance tests mainly involve flow rate and pressure tests, that is, by installing a flow meter and a pressure sensor, measuring the flow rate and pressure output of the mud pump 120 under different working conditions, and evaluating whether it meets the design requirements; efficiency tests, that is, calculating the mechanical efficiency and volumetric efficiency of the mud pump 120 and analyzing its energy conversion efficiency; and power tests, that is, measuring the input power of the driving motor 130 and evaluating the energy consumption of the mud pump 120 under different loads. The reliability tests mainly involve durability tests, that is, through long-term operation experiments, evaluating the reliability and durability of the mud pump 120 under continuous working conditions; fatigue tests, that is, simulating the frequent start-stop and pressure fluctuations in actual working conditions and testing the fatigue strength of the pump body and key components; and wear tests, that is, studying the wear of the pump body, plunger, seals and other components by solid particles in the mud and evaluating its service life.

[0023] In one embodiment, please refer to Figure 6 , in order to achieve the interception of solid particles by the partition disk 320 and the separation of the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312, a number of filter screen plates 321 are circumferentially distributed on the partition disk 320. The aperture of the filter screen plates 321 can intercept solid particles and allow the mud to pass smoothly. A cover plate 360 adapted to each filter screen plate 321 is rotatably installed on the partition disk 320; Specifically, when adjusting the position of the partition disk 320, rotate the cover plate 360 to stagger the cover plate 360 from each filter screen plate 321, so as to facilitate the mud to pass through the filter screen plates 321 smoothly, thereby adjusting the space between the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312 by using the partition disk 320; After the partition disk 320 is adjusted to the corresponding position, rotate the cover plate 360 to cover each filter screen plate 321, so as to separate the mud solid content simulation chamber 311 and the mud viscosity simulation chamber 312, and prevent 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.

[0024] Further, please refer to Figure 4 and Figure 5 , for the height adjustment method of the partition disk 320, a lifting cylinder 370 for driving the partition disk 320 is installed on the recovery barrel 310. A number of guide bars 313 are circumferentially arranged on the inner circumference of the recovery barrel 310. The partition disk 320 is slidably connected to the guide bars 313; By driving the partition disk 320 with the lifting cylinder 370, the partition disk 320 can be driven to slide up and down in the vertical direction along the guide bars 313, so as to achieve the height adjustment of the partition disk 320.

[0025] Further, please refer to Figure 6 , Figure 7 and Figure 8 . The slurry pumping member 330 includes a cylinder 331 coaxially fixed to the partition disk 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, and 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 ports 332 and the lower slurry pumping ports 333 are staggered from each other. Please refer to Figure 5 . A switching member 340 adapted to the upper slurry pumping ports 332 and the lower slurry pumping ports 333 is movably provided in the cylinder 331. Specifically, when performing the slurry solid content simulation test, the state of the slurry pumping member 330 is switched through the switching member 340 to conduct the upper slurry pumping ports 332 and block the lower slurry pumping ports 333, so that the slurry mixed with solid particles in the slurry solid content simulation chamber 311 enters the slurry pumping member 330 through the upper slurry pumping ports 332, so as to suck the solid particles and the slurry in the slurry solid content simulation chamber 311 into the heating tank 210. When performing the slurry viscosity simulation test, the state of the slurry pumping member 330 is switched through the switching member 340 to block the upper slurry pumping ports 332 and conduct the lower slurry pumping ports 333, so that the slurry in the slurry viscosity simulation chamber 312 enters the slurry pumping member 330 through the lower slurry pumping ports 333, so as to suck the slurry in the slurry viscosity simulation chamber 312 into the heating tank 210.

[0026] It should be noted that through the coaxially fixed cylinder 331 and the switching member 340, combined with the staggered upper slurry pumping ports 332 and lower slurry pumping ports 333, accurate switching and extraction of the slurry in different chambers are realized, so that the slurry containing solid particles or the slurry with solid particles filtered out can be quickly and accurately selected for extraction without additional pipeline switching or complex operations. The switching member 340 is adapted to the upper slurry pumping ports 332 and the lower slurry pumping ports 333. Since the upper slurry pumping ports 332 and the lower slurry pumping ports 333 are staggered from each other in the vertical direction and are blocked and conducted through the switching member 340, it is ensured that the two slurries with different characteristics will not be mixed with each other, and the slurry that does not need to be extracted can be effectively blocked during the switching process, thus ensuring the accuracy and reliability of the experimental data.

[0027] Correspondingly, please refer to Figure 9 . The switching member 340 includes a turntable 341 rotatably provided in the cylinder 331, and a plurality of sealing pieces 342 adapted to the upper slurry pumping ports 332 and the lower slurry pumping ports 333 are circumferentially provided on the turntable 341. 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; 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.

[0028] 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.

[0029] 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. 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.

[0030] 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 ; 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.

[0031] Further, see Figure 10, the heating tank 210 includes a housing 211, a jacket 212 and an inner tank 213 which are nested in sequence from outside to inside; a heat preservation cavity 214 is formed between the housing 211 and the jacket 212, a heating cavity 215 is formed between the jacket 212 and the inner tank 213, a water inlet pipe 216 is arranged at the lower end of the heating cavity 215, and a water outlet pipe 217 is arranged at the upper end of the heating cavity 215; When it is necessary to heat the mud in the heating tank 210 to change the mud viscosity, hot water is introduced into the heating cavity 215 from the water inlet pipe 216. The hot water flows from bottom to top, so as to heat the mud in the inner tank 213. The cold water after absorbing heat flows out from the water outlet pipe 217. The heat preservation cavity 214 isolates the jacket 212 and the inner tank 213 from the outside, so that the inner tank 213 can be heat-preserved, avoiding internal heat loss and effectively improving the heating efficiency.

[0032] Furthermore, please refer to Figure 10 , the stirring member includes a hollow rotating shaft 230 rotatably installed in the heating tank 210. A stirring disc 240 is arranged at the lower end of the hollow rotating shaft 230. A stirring motor 220 for driving the hollow rotating shaft 230 is installed at the top of the heating tank 210; Specifically, after the mud flows back into the heating tank 210, the stirring motor 220 drives the hollow rotating shaft 230 to rotate, so as to drive the stirring disc 240 to circumferentially stir and disperse the mud, promoting the uniformity of the mud components and ensuring the accuracy of the experimental results.

[0033] Considering that the stirring disc 240 only stirs the mud circumferentially, during the stirring process, some components with larger density in the mud are prone to settle. Especially when simulating the solid content of the mud, the solid particles in the mud are extremely prone to settle, resulting in the stratification of the mud. In this way, it is easy to cause a large difference in the state of the mud entering the mud pump 120 successively in the same batch, and further affect the accuracy of the experimental test results; for this reason, please refer to Figure 10 and Figure 11 , a flexible turbulence bag 250 is arranged in the heating tank 210 below the stirring member. The flexible turbulence bag 250 is fixed on the inner wall of the heating tank 210 through circumferentially distributed elastic bands 251. A connecting disc 252 is arranged at the center of the flexible turbulence bag 250. A driving member for driving the connecting disc 252 to reciprocate up and down is arranged in the heating tank 210; a number of stepped notches 253 are circumferentially formed on the connecting disc 252, and a one-way sealing plate 254 is rotatably installed in the stepped notches 253; 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.

[0034] 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; 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.

[0035] See also Figure 10 、 Figure 11 and Figure 12, the driving member includes a piston rod 255 coaxially fixed to the connecting disk 252, and the upper end of the piston rod 255 is movably embedded in the hollow rotating shaft 230; a gas chamber 260 is provided at the top inside the heating tank 210, and a sealing ring 261 is provided at the connection between the gas chamber 260 and the hollow rotating shaft 230. A trachea 262 is connected to the top of the gas chamber 260, and a plurality of through holes 231 communicating with the inside of the gas chamber 260 are formed in the hollow rotating shaft 230; Specifically, when air is blown into the gas chamber 260 through the trachea 262, the gas in the gas chamber 260 enters the hollow rotating shaft 230 through the through holes 231, so as to be able to push the piston rod 255 downward to drive the connecting disk 252 to descend synchronously for the collection of bottom mud; When air is pumped out of the gas chamber 260 through the trachea 262, under the action of negative pressure, the gas in the hollow rotating shaft 230 enters the gas chamber 260 through the through holes 231, thereby driving the piston rod 255 to move upward along the hollow rotating shaft 230 to drive the connecting disk 252 to rise synchronously to throw the collected mud outward.

[0036] The specific implementation manners of this embodiment have been described above, but this embodiment is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A mud pump experimental device, characterized in that, Comprising: A pump body experiment unit (100), which includes a mounting table (110) for fixing the mud pump to be tested (120), and a driving motor (130) for driving the mud pump (120) is further provided on the mounting table (110); A mud supply unit (200), which is located on the input side of the mud pump (120) and is used for conveying mud to the mud pump (120), including a heating tank (210) for storing mud, and a stirring member is arranged in the heating tank (210); A mud reflux unit (300), which is located on the output side of the mud pump (120) and is used for recovering and refluxing the mud pumped out by the mud pump (120) to the mud supply unit (200), including a recovery barrel (310) and a partition plate (320) that is liftably arranged in the recovery barrel (310). The partition plate (320) is used for intercepting solid particles in the mud. The partition plate (320) divides the inside of the recovery barrel (310) into a mud solid content simulation chamber (311) and a mud viscosity simulation chamber (312) that are distributed up and down. A slurry pumping member (330) that is selectively communicated with the mud solid content simulation chamber (311) and the mud viscosity simulation chamber (312) is arranged on the partition plate (320).

2. The mud pump experimental device according to claim 1, characterized in that, A plurality of filter screen pieces (321) are circumferentially distributed on the partition plate (320), and a cover plate (360) adapted to each filter screen piece (321) is rotatably installed on the partition plate (320).

3. The mud pump experimental device according to claim 1, characterized in that, The slurry pumping member (330) includes a cylinder body (331) fixedly coaxial with the partition plate (320). A plurality of upper slurry pumping ports (332) communicated with the mud solid content simulation chamber (311) are opened at the upper end of the cylinder body (331), and a plurality of lower slurry pumping ports (333) communicated with the mud viscosity simulation chamber (312) are opened at the lower end of the cylinder body (331); In the vertical direction, the upper slurry pumping ports (332) and the lower slurry pumping ports (333) are staggered from each other; a switching member (340) adapted to the upper slurry pumping ports (332) and the lower slurry pumping ports (333) is movably arranged in the cylinder body (331).

4. The mud pump experimental device according to claim 3, characterized in that, The switching member (340) includes a turntable (341) rotatably arranged in the cylinder body (331), and a plurality of sealing pieces (342) adapted to the upper slurry pumping ports (332) and the lower slurry pumping ports (333) are circumferentially arranged on the turntable (341).

5. The mud pump experimental device according to claim 1, wherein A lifting cylinder (370) for driving the partition plate (320) is installed on the recovery barrel (310), and a plurality of guide bars (313) are circumferentially arranged inside the recovery barrel (310). The partition plate (320) is slidably connected with the guide bars (313).

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

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

8. The mud pump experimental device according to claim 1, characterized in that, The stirring member includes a hollow rotating shaft (230) rotatably installed in the heating tank (210), a stirring disc (240) is arranged 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. The mud pump experimental device according to claim 8, wherein, A flexible flow disturbing bag (250) is arranged in the heating tank (210) below the stirring member. The flexible flow disturbing bag (250) is fixed to the inner wall of the heating tank (210) through elastic bands (251) distributed circumferentially. A connecting disc (252) is arranged at the center of the flexible flow disturbing bag (250). A driving member for driving the connecting disc (252) to reciprocate up and down is arranged in the heating tank (210); a number of stepped notches (253) are circumferentially formed in the connecting disc (252), and one-way sealing plates (254) are rotatably installed in the stepped notches (253).

10. The mud pump experimental device according to claim 9, characterized in that, The driving member includes a piston rod (255) coaxially fixed to the connecting disc (252). The upper end of the piston rod (255) is movably embedded in the hollow rotating shaft (230); a gas chamber (260) is arranged at the top inside the heating tank (210). A sealing ring (261) is arranged at the connection between the gas chamber (260) and the hollow rotating shaft (230). A trachea (262) is connected to the top of the gas chamber (260), and a number of through holes (231) communicating with the inside of the gas chamber (260) are formed in the hollow rotating shaft (230).

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