Peristaltic pump for experimental test

Abstract

The invention relates to the technical field of peristaltic pumps, in particular to a peristaltic pump for experimental testing. The hose is fixedly installed on the inner wall of the pump shell, and the hose is provided with a water inlet and a water outlet; a sliding groove is formed in the pump shell, a displacement block is installed in the sliding groove in a sliding mode, and a short shaft is rotatably installed in the displacement block. By arranging the standby extrusion assembly, when the concentration and viscosity of liquid are increased, the standby extrusion assembly is inserted into the main shaft, and the distance between the newly-inserted extrusion assembly and the original extrusion assembly is equal through the magnetic repulsive force of the second electromagnet, so that the hose is uniformly extruded, the conveyed liquid is stable, and the conveying efficiency is improved. The pressure fluctuation caused by extrusion of the hose is avoided, and the pushing force on liquid with high concentration and viscosity can be increased by increasing the number, so that the liquid can pass through the hose more stably, and the fluctuation of the liquid in the pumping process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of peristaltic pumps, and in particular to a peristaltic pump used for experimental testing. Background Art

[0002] Peristaltic pump is a special type of pump, mainly used for conveying fluids. It conveys fluids by compressing flexible pipes. It has the characteristics of complete isolation of fluids and pump components, avoiding contamination or corrosion. It is suitable for conveying chemicals, drugs, food and water treatment. Peristaltic pumps are mainly used for precise liquid supply. In mass spectrometry analysis, the precise flow rate and stability of liquid samples are crucial, especially in liquid chromatography-mass spectrometry systems. Peristaltic pumps can accurately control the flow of liquids by compressing flexible pipes to ensure stable delivery of samples in mass spectrometers.

[0003] There are many types of existing peristaltic pumps. For example, the patent with publication number CN118517402B discloses a peristaltic pump with fine-tunable flow rate. The device adjusts the flow rate of the peristaltic pump by changing the rotation speed of the rotating frame. When providing sample liquid to the mass spectrometer, the concentration and viscosity of the pumped liquid will be different. For liquids of different concentrations and viscosities, the common practice is to use thicker and more pressure-resistant pipes, or wear-resistant and corrosion-resistant pipes. These pipes can ensure that the peristaltic pump works normally for a long time and prevent leakage or damage. However, the cost of replacing the pipe is high, and the selection of suitable materials needs to consider the specific characteristics of the liquid. For example, high-concentration or high-viscosity liquids may require a more robust pipeline design; In addition, the existing technology uses the method of adjusting the delivery flow rate of liquids of different concentrations and viscosities by adjusting the rotational speed of the pump. However, increasing the rotational speed usually brings a series of adverse effects on the delivery system of high-viscosity and high-concentration liquids. For example, as the rotational speed increases, the friction between the liquid and the pipe wall will increase, resulting in increased energy consumption; at the same time, the pressure fluctuations inside the pipeline will also intensify, which may cause pipeline vibration or damage. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a peristaltic pump for experimental testing, which can effectively solve the problem in the prior art that when the viscosity and concentration of the liquid are too high, high-speed extrusion reduces the service life of the delivery tube.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a peristaltic pump for experimental testing, comprising: Pump housing; A hose is fixedly mounted on the inner wall of the pump housing, and the hose is provided with a water inlet and a water outlet; A driving component, wherein a slide groove is provided in the pump housing, a displacement block is slidably installed in the slide groove, a short shaft is rotatably installed in the displacement block, a main shaft is fixedly installed on the upper end of the short shaft, and a plurality of extrusion components are rotatably installed on the outer wall of the main shaft, and the extrusion components roll the hose; A fixing assembly, used for fixing the extrusion assembly to the outer wall of the main shaft; The moving assembly is used to drive multiple driving assemblies to move linearly. The moving assembly includes a mounting seat arranged on one side, and the mounting seat is used to load a spare extrusion assembly.

[0006] Preferably, a first rotary driving member is fixedly mounted on the lower end surface of the displacement block, an output end of the first rotary driving member penetrates the displacement block and is fixedly connected to the short shaft, an annular groove is provided on the outer wall of the main shaft, an annular clamping groove is provided on the upper and lower inner walls of the annular groove, a plurality of first springs are fixedly mounted on a circumferential array in the annular clamping groove, and a clamping ring is fixedly mounted on the plurality of first springs symmetrically up and down, and the clamping ring is slidably connected to the annular groove; The extrusion assembly includes a second chuck rotatably mounted on the inner wall of the annular groove, grooves are provided at the upper and lower ends of the second chuck, a joint is fixedly mounted on the end of the second chuck away from the axis of the spindle, an extrusion roller is rotatably mounted inside the joint, second electromagnets are symmetrically mounted at the upper positions on both sides of the joint, and second electromagnets with magnetic repulsion are respectively fixed on opposite sides of two adjacent joints, and the second electromagnets are electrically connected to the controller.

[0007] Preferably, first electromagnets are symmetrically fixedly installed on both sides of the displacement block, the first electromagnets are electrically connected to a controller, two sliding rods are symmetrically installed on the inner wall of the slide slot, the sliding rods are slidably connected to the first electromagnets, and a second spring is fixedly installed between the displacement block and the slide slot.

[0008] Preferably, the upper end of the main shaft is in contact with and connected with a fixed box, and a lifting disc is vertically slidably installed on the inner wall of the fixed box, and an electromagnetic disk is fixedly installed on the outer wall of the lifting disc, and the electromagnetic disk is electrically connected to the controller, and the electromagnetic disk cooperates with the second electromagnet by magnetic attraction, and a bracket is fixedly installed on the upper end of the lifting disc, and an inclined groove is opened in the bracket, and an electric connector is fixedly installed on the inner bottom end of the inclined groove, and the electric connector is electrically connected to the electromagnetic disk and the first electromagnet, and a lifting conductive rod is slidably installed on the inner top end of the inclined groove, and the lifting conductive rod is electrically connected to an external power supply, and the upper end of the lifting conductive rod passes through the bracket, and a U-shaped frame is fixedly installed on the upper end of the bracket, and a third spring is fixedly installed between the U-shaped frame and the lifting conductive rod, and L-shaped brackets are symmetrically fixedly installed on both sides of the bracket, and a vertical sliding rod is slidably installed on the lower end of the L-shaped bracket, and the vertical sliding rod is fixedly connected to the pump casing.

[0009] Preferably, the moving assembly includes a vertical plate fixedly installed on the lower end surface of the pump casing, a rod body is rotatably installed on one side of the vertical plate, and a second rotation driving member is fixedly installed on the other side of the vertical plate, the second rotation driving member is electrically connected to the controller, and the output end of the second rotation driving member passes through the vertical plate and is fixedly connected to the rod body, the outer wall of the rod body is provided with a first thread groove and a second thread groove with opposite thread directions, and the second thread groove is arranged close to the mounting seat, the pitch of the first thread groove is greater than the pitch of the second thread groove, and a moving plate is threaded on the outer wall of the rod body at the second thread groove, and the upper end of the moving plate is fixedly connected to the mounting seat.

[0010] Preferably, a movable frame is slidably installed on the outer wall of the first electromagnet, one end of the rod body passes through the movable frame and is threadedly connected through a first thread groove, a U-shaped displacement bracket is fixedly installed on one side of the movable frame, and a first clamp is integrally formed at the upper end of the U-shaped displacement bracket and at the position corresponding to the inclined groove.

[0011] Preferably, it also includes a detection component, which includes a mounting plate fixedly installed on the outer wall of the hose and at the water inlet, a lamp embedded in the mounting plate, a sealing cover fixedly installed on the inner wall of the hose and at a position corresponding to the lamp, a light source detection element fixedly installed in the sealing cover and at a position corresponding to the lamp, and the light source detection element is electrically connected to the controller.

[0012] Preferably, the outer wall of the hose is connected to an external pipe at the water inlet, a water inlet plate is fixedly installed on one end of the external pipe, a water inlet hole is provided inside the water inlet plate, a water outlet plate is fixedly installed on the other end of the external pipe, a water outlet hole is provided inside the water outlet plate, the number of the water inlet holes is greater than the number of the water outlet holes, a flow channel plate is fixedly installed on the inner wall of the external pipe and at a position close to the water inlet plate, a curved flow groove is provided in the flow channel plate, a sealing plate is air-tightly slidably installed on one side of the external pipe, two plug plates are symmetrically installed on one side of the sealing plate, two holders are symmetrically installed on one side of the external pipe, the plug plates are slidably connected to the holder, a viscosity detection element is fixedly installed on one side of the sealing plate, the viscosity detection element is electrically connected to the controller, and the detection end of the viscosity detection element passes through the sealing plate and extends into the external pipe; A conductive ring is fixedly installed on the inner bottom end of the pump housing, and the conductive ring is electrically connected to the controller. The extrusion roller is filled with magnetorheological fluid, and an electromagnetic device is fixedly installed on the inner bottom end of the extrusion roller. An elastic electric contact is fixedly connected to the lower end of the joint, and the electromagnetic device is electrically connected to the elastic electric contact, and the elastic electric contact is electrically connected to the conductive ring.

[0013] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: First, when the concentration and viscosity of the liquid increase, a spare extrusion assembly is inserted into the main shaft, and the magnetic repulsion of the second electromagnet makes the spacing between the newly inserted extrusion assembly and the original extrusion assembly equal, so as to keep the hose evenly squeezed, make the transported liquid stable, avoid fluctuations in the pressure caused by the squeezing of the hose, and increasing the number of extrusion assemblies can increase the pushing force for liquids with higher concentration and viscosity, so that the liquid can pass through the hose more smoothly and reduce the fluctuation of the liquid during the pumping process. By adjusting the number of extrusion assemblies, the extrusion force can be adjusted according to the different concentrations and viscosities of the liquid. Liquids with higher viscosity require greater pushing force. At this time, increasing the number of extrusion assemblies can better push the liquid. For liquids with lower viscosity, the number of extrusion assemblies can be appropriately reduced, thereby improving efficiency and saving energy.

[0014] Secondly, a conductive ring is arranged in contact with the elastic electric contact, and the conductive ring is energized to the elastic electric contact, so that the electromagnetic device is energized to generate a magnetic field. When the concentration and viscosity of the liquid are detected to increase, the voltage of the conductive ring is increased, and the magnetic force of the electromagnetic device is increased to increase the hardness of the magnetorheological fluid in the extrusion roller, so that the extrusion roller can maintain a stable shape under greater pressure, and better produce an extrusion and pushing effect on high-viscosity samples. Increasing the hardness of the extrusion roller can more flexibly respond to changes in liquid viscosity, especially for high-viscosity liquids. When the viscosity of the liquid is high, a harder extrusion roller can provide greater extrusion force to ensure that the liquid can pass smoothly through the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the driving assembly of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of the main shaft of the present invention; Figure 4 for Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a structural schematic diagram of the fixing assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the support of the present invention; Figure 7 It is a structural schematic diagram of the mobile assembly of the present invention; Figure 8 It is a structural schematic diagram of the detection component of the present invention; Fig. 9 It is a schematic cross-sectional structural diagram of the detection assembly of the present invention; Fig.10 for Fig. 9 The enlarged structural diagram at B in the middle; Fig.11 It is a schematic structural diagram of the conductive ring of the present invention.

[0017] 1. Pump housing; 2. Hose; 3. Driving assembly; 301. First rotating driving member; 302. Displacement block; 303. Main shaft; 304. Clamp; 305. First spring; 306. Annular groove; 307. First electromagnet; 308. Slide bar; 309. Second spring; 310. Slide slot; 4. Fixing assembly; 401. Fixing box; 402. Lifting disc; 403. Electromagnetic disc; 404. Bracket; 405. Vertical bar; 406. Electrical connector; 407. Lifting conductive rod; 408. U-shaped frame; 409. Third spring; 410. L-shaped bracket; 411. Vertical slide bar; 5. Moving assembly; 501. Vertical plate; 502. Second Rotating drive member; 503, rod body; 504, moving frame; 505, U-shaped displacement bracket; 506, first clamp; 507, moving plate; 508, mounting seat; 6, detection assembly; 601, mounting plate; 602, irradiation lamp; 603, sealing cover; 604, light source detection element; 605, external pipe; 606, water inlet plate; 607, water outlet plate; 608, flow channel plate; 609, sealing plate; 610, clamp seat; 611, viscosity detection element; 612, plug plate; 613, conductive ring; 614, elastic electric contact; 8, extrusion assembly; 801, second clamp; 802, joint; 803, extrusion roller; 804, second electromagnet. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] Example: Refer to Figures 1 to 11 , a peristaltic pump used in experimental tests, comprising: Pump housing 1; The hose 2 is fixedly mounted on the inner wall of the pump housing 1. The hose 2 is made of a transparent material so that the light of the irradiation lamp can effectively penetrate the hose 2. The hose 2 is provided with a water inlet and a water outlet; The driving component 3 has a slide groove 310 in the pump housing 1, a displacement block 302 is slidably installed in the slide groove 310, a short shaft is rotatably installed in the displacement block 302, a main shaft 303 is fixedly installed on the upper end of the short shaft, and a plurality of extrusion components 8 are rotatably installed on the outer wall of the main shaft 303, and the extrusion components 8 roll the hose 2; A fixing assembly 4, used to fix the extrusion assembly 8 on the outer wall of the main shaft 303; The moving assembly 5 is used to drive the plurality of driving assemblies 3 to move linearly. The moving assembly 5 includes a mounting seat 508 disposed on one side of 303 . The mounting seat 508 is used to load a spare extrusion assembly 8 .

[0021] Reference Figures 1 to 4 , a first rotating driving member 301 is fixedly installed on the lower end surface of the displacement block 302, the output end of the first rotating driving member 301 passes through the displacement block 302 and is fixedly connected to the short shaft, an annular groove 306 is provided on the outer wall of the main shaft 303, and an annular clamping groove is provided on the upper and lower inner walls of the annular groove 306, and a plurality of first springs 305 are fixedly installed on the inner circumferential array of the annular clamping groove, and the plurality of first springs 305 are symmetrically fixedly installed with a clamping ring 304 on the upper and lower sides, and the clamping ring 304 is slidably connected to the annular groove; the extrusion component 8 includes a second clamping head 801 rotatably installed on the inner wall of the annular groove 306, grooves are provided on the upper and lower ends of the second clamping head 801, a joint 802 is fixedly installed on the end of the second clamping head 801 away from the axis of the main shaft 303, an extrusion roller 803 is rotatably installed inside the joint 802, and second electromagnets 804 are symmetrically installed at the upper positions on both sides of the joint 802, and second electromagnets with magnetic repulsion are respectively fixed on opposite sides of two adjacent joints 802 Iron 804, the second electromagnet 804 is electrically connected to the controller, the first electromagnet 307 is symmetrically fixedly installed on both sides of the displacement block 302, and the first electromagnet 307 is electrically connected to the controller. Two sliding rods 308 are symmetrically installed on the inner wall of the slide groove 310, and the sliding rod 308 is made of iron material. The first electromagnet 307 slides on the outer wall of the sliding rod 308, and the magnetic force generated by the first electromagnet 307 is adsorbed on the outer wall of the sliding rod 308 to avoid the shaking of the driving component 3. The sliding rod 308 is slidably connected to the first electromagnet 307, and a second spring 309 is fixedly installed between the displacement block 302 and the slide groove. Through the setting of the clamping ring 304, when a new extrusion component 8 is inserted into the annular groove 306, the extrusion component 8 will squeeze the clamping ring 304, so that the clamping ring 304 is lifted and lowered in the annular groove 306 to fix the extrusion component 8. When the extra extrusion component 8 is not needed, the extra extrusion component 8 can be removed by pressing or lifting the clamping ring 304 in the sliding groove annular groove.

[0022] Reference Figures 5 and 6The upper end of the main shaft 303 is in contact with a fixed box 401, and a lifting disc 402 is vertically slidably installed on the inner wall of the fixed box 401. An electromagnetic disk 403 is fixedly installed on the outer wall of the lifting disc 402. The electromagnetic disk 403 is an existing device made of an iron core, a coil and a shell. When the electromagnetic disk 403 adsorbs the second electromagnet 804, it can prevent the joint 802 from shaking in the annular groove 306, resulting in a deviation in the distance between each extrusion roller 803. The electromagnetic disk 403 is electrically connected to the controller, and the electromagnetic disk 403 cooperates with the second electromagnet 804 by magnetic attraction. A bracket 404 is fixedly installed on the upper end of the lifting disc 402, and an inclined groove is opened in the bracket 404. An electric connector 406 is fixedly installed on the inner bottom end of the inclined groove. The electric connector 406 It is electrically connected to the electromagnetic disk 403 and the first electromagnet 307, and a lifting conductive rod 407 is slidably installed on the inner top end of the inclined groove. The lifting conductive rod 407 is limitedly slidably connected to the bracket 404. The lower end of the lifting conductive rod 407 is an inclined surface, which is convenient for sliding with the inclined surface of the upper end surface of the first clamp 506. The lifting conductive rod 407 is electrically connected to an external power supply. The upper end of the lifting conductive rod 407 passes through the bracket 404, and a U-shaped frame 408 is fixedly installed on the upper end of the bracket 404. A third spring 409 is fixedly installed between the U-shaped frame 408 and the lifting conductive rod 407, and L-shaped brackets 410 are symmetrically fixedly installed on both sides of the bracket 404. A vertical slide rod 411 is slidably installed on the lower end of the L-shaped bracket 410, and the vertical slide rod 411 is fixedly connected to the pump housing 1.

[0023] Reference Figure 7The moving assembly 5 includes a vertical plate 501 fixedly installed on the lower end surface of the pump housing 1, a rod body 503 is rotatably installed on one side of the vertical plate 501, and a second rotating driving member 502 is fixedly installed on the other side of the vertical plate 501, the second rotating driving member 502 is electrically connected to the controller, and the output end of the second rotating driving member 502 passes through the vertical plate 501 and is fixedly connected to the rod body 503, and the outer wall of the rod body 503 is provided with a first thread groove and a second thread groove with opposite thread directions, and the second thread groove is arranged near the mounting seat 508, and the pitch of the first thread groove is greater than the pitch of the second thread groove. When the rod body 503 rotates, the first thread groove and the second thread groove will respectively drive the moving plate 507 and the moving frame 504 to move, and the first thread groove with a larger thread groove pitch will drive the moving plate 507 and the moving frame 504 to move. The plate 507 moves at a relatively fast speed, and the second thread groove with a smaller thread groove pitch will drive the moving frame 504 to move in the direction of the moving plate 507 at a slower speed. The outer wall of the rod body 503 is threaded with a moving plate 507 at the second thread groove, and the upper end of the moving plate 507 is fixedly connected to the mounting seat 508. The outer wall of the first electromagnet 307 is slidably mounted with the moving frame 504, one end of the rod body 503 penetrates the moving frame 504 and is threadedly connected by the first thread groove, and a U-shaped displacement bracket 505 is fixedly mounted on one side of the moving frame 504, and the upper end of the U-shaped displacement bracket 505 and the first clamping head 506 are integrally formed at the position corresponding to the inclined groove, and the first rotation drive member 301 and the second rotation drive member 502 can be used with existing rotation motors.

[0024] Reference Figures 8 to 11, and also includes a detection component 6, the detection component 6 includes a mounting plate 601 fixedly installed on the outer wall of the hose 2 and at the water inlet, a lighting lamp 602 is embedded in the mounting plate 601, a sealing cover 603 is fixedly installed on the inner wall of the hose 2 and at a position corresponding to the lighting lamp 602, and a light source detection element 604 is fixedly installed in the sealing cover 603 and at a position corresponding to the lighting lamp 602. The light source detection element 604 is an existing photoresistor. The photoresistor is a component whose resistance changes with the light intensity. Its resistance value will decrease when the light intensity is strong, and conversely, the resistance will increase when the light intensity is weak. The light source detection element 60 4 is electrically connected to the controller, the outer wall of the hose 2 is connected to an external pipe 605 at the water inlet, a water inlet plate 606 is fixedly installed at one end of the external pipe 605, a water inlet hole is opened inside the water inlet plate 606, a water outlet plate 607 is fixedly installed at the other end of the external pipe 605, a water outlet hole is opened inside the water outlet plate 607, and the number of water inlet holes is greater than the number of water outlet holes, a flow channel plate 608 is fixedly installed on the inner wall of the external pipe 605 and at a position close to the water inlet plate 606, a curved flow groove is opened inside the flow channel plate 608, a sealing plate 609 is airtightly slidably installed on one side of the external pipe 605, and one side of the sealing plate 609 is Two plug plates 612 are symmetrically installed on one side of the external pipe 605, and two holders 610 are symmetrically installed on one side of the external pipe 605. The plug plates 612 are slidably connected to the holders 610. A viscosity detection element 611 is fixedly installed on one side of the sealing plate 609. The viscosity detection element 611 is an existing device. This sensor evaluates the viscosity of the fluid by measuring the resistance of the fluid during rotation. The viscosity detection element 611 is electrically connected to the controller. The detection end of the viscosity detection element 611 passes through the sealing plate 609 and extends into the external pipe 605; a conductive ring 613 is fixedly installed on the inner bottom end of the pump housing 1, and the conductive ring 613 is electrically connected to the controller. The extrusion roller 803 is filled with magnetorheological fluid, an electromagnetic device is fixedly installed on the inner bottom end of the extrusion roller 803, an elastic electric contact 614 is fixedly connected to the lower end of the joint 802, the electromagnetic device is electrically connected to the elastic electric contact 614, the elastic electric contact 614 is electrically connected to the conductive ring 613, the extrusion roller 803 is made of rubber material, when the magnetorheological fluid is subjected to the magnetic field of the electromagnetic device and presents a Bingham fluid with high viscosity and low fluidity, the hardness of the extrusion roller 803 can be increased, which helps to reduce the deformation of the extrusion roller 803, and the hardness of the magnetorheological fluid is proportional to the concentration change of the liquid.

[0025] The working principle of the present invention is as follows: By opening the first rotating driving member 301 to drive the short shaft to rotate, the main shaft 303 is driven to rotate. The rotating main shaft 303 drives the squeezing roller 803 to squeeze the hose 2 in turn. When the squeezing roller 803 presses the hose 2, the liquid in the hose 2 is pushed forward. As the squeezing roller 803 rotates continuously, the fluid in the hose 2 is gradually squeezed out and flows out from the water outlet. 1. Detection of liquid concentration and viscosity: The light irradiated by the irradiation lamp 602 on the outer wall of the hose 2 will penetrate the liquid flowing in the hose 2 and be received by the light source detection element 604. According to the Lambert-Beer law, when a beam of parallel monochromatic light passes through a uniform liquid, the degree of absorption of light by the liquid is proportional to the concentration of the light-absorbing substance in the liquid. The light source detection element 604 detects the absorbance of the liquid to light of a specific wavelength, calculates the concentration of the substance in the sample, and thereby detects the concentration of the liquid flowing in the hose 2. It should be noted that the light source detection element 604 needs to be calibrated, and the hose 2 will block part of the light source when the light penetrates the hose 2; When the liquid is being pumped, part of the liquid will enter the external tube 605 through the water inlet hole, and then be discharged from the water outlet hole through the curved flow groove, and flow back into the hose 2. The number of water inlet holes is greater than the water outlet holes. During the flow of the liquid, the liquid cannot be discharged from the external tube 605 in time, and a differential pressure will be formed in the external tube 605 (during the flow of the liquid, the amount of liquid in the external tube 605 increases with the inflow of the liquid. If the speed of liquid discharge cannot keep up with the speed of liquid inflow, a pressure difference will be caused between the water inlet hole and the water outlet hole, and the pressure difference will slow down the flow rate of the liquid), causing the liquid to flow slowly. In addition, the curved flow groove will increase the friction of the liquid flowing in the flow groove, slowing down the flow rate of the liquid in the external tube 605, thereby increasing the detection accuracy of the viscosity detection element 611. The viscosity detection element 611 will detect the viscosity of the liquid in the external tube 605, and the liquid flowing through the external tube 605 will re-enter the hose 2; 2. Adjust the number of extrusion rollers 803: When the light source detection element 604 and the viscosity detection element 611 detect that the concentration and viscosity of the liquid are too high, the light source detection element 604 and the viscosity detection element 611 will generate electrical signals according to the concentration and viscosity of the liquid. The controller controls the voltage transmitted to the second rotating drive member 502 according to the electrical signals, so that the second rotating drive member 502 drives the rod body 503 to rotate. The rotating rod body 503 will drive the moving plate 507, the mounting seat 508 and the spare extrusion assembly 8 to approach the main shaft 303. At the same time, the rotating rod body 503 will drive the moving frame 504 to move toward the position of the mounting seat 508. The moving moving frame 504 will drive the U-shaped displacement bracket 505 and the first clamping head 506 to move into the inclined groove. A clamp head 506 contacts the lifting conductive rod 407, squeezes the lifting conductive rod 407 to move upward and compresses the third spring 409, so that the lifting conductive rod 407, the electrical connector 406 and the first electromagnet 307 are disconnected from the power supply, so that the electromagnetic disk 403 and the first electromagnet 307 lose their magnetism, and the electromagnetic disk 403 stops being magnetically attracted to the second electromagnet 804, and the first electromagnet 307 stops being magnetically attracted to the slide bar 308. As the first clamp head 506 is continuously driven to move and squeezes the inclined groove to drive the bracket 404, the vertical rod 405, the lifting disc 402 and the electromagnetic disk 403 to rise, while the moving frame 504 is continuously moving, the inner wall of the moving frame 504 contacts the first electromagnet 307 to drive the first electromagnet 307 to slide in the slide groove. The second spring 309 is moved and compressed, so that the displacement block 302 and the first electromagnet 307 drive the extrusion roller 803 to break away from the contact with the hose 2 and move toward the spare extrusion assembly 8 that is driven to move, so that the second clamping head 801 formed on the spare extrusion assembly 8 is squeezed with the clamping ring 304. During the extrusion process, the clamping ring 304 compresses the first spring 305, so that the second clamping head 801 fits with the outer wall of the annular groove 306, and the squeezed clamping ring 304 rises and then falls in the annular groove to clamp into the groove of the second clamping head 801 to fix the second clamping head 801. The voltage input to the second electromagnet 804 is controlled by the controller to disconnect the voltage, so that the second electromagnet 804 is powered off and then powered on. After the second electromagnet 804 is reconnected to the voltage to generate magnetic force, the two adjacent connections Because the magnetic repulsion of the second electromagnet 804 moves on the outer wall of the main shaft 303 between the heads 802, and the voltage supplied to each second electromagnet 804 is equal, the magnetic repulsion of the second electromagnet 804 interacts with each other, so that the same circumferential distance is maintained between two adjacent second electromagnets 804, so that the number of extrusion assemblies 8 can be increased to allow multiple extrusion rollers 803 to extrude the hose 2. Multiple extrusion rollers 803 can form multiple extrusion points on the hose 2 to disperse the pressure on the hose 2, and at the same time increase the pushing force on the liquid with higher concentration and viscosity, so that the liquid can pass through the hose 2 more smoothly, reducing the fluctuation of the liquid during the pumping process. It should be noted that the extrusion assembly 8 that can be prepared by the existing manipulator is placed on the mounting seat 508.In this way, the number of extrusion components 8 can be adjusted according to the different concentrations and viscosities of the liquid. By adjusting the number of extrusion components 8, the extrusion force can be adjusted according to the different concentrations and viscosities of the liquid. Liquids with higher viscosity require greater pushing force. In this case, increasing the number of extrusion components can better push the liquid. For liquids with lower viscosity, the number of extrusion components can be appropriately reduced, thereby improving efficiency and saving energy. It should be noted that, after the new extrusion assembly 8 is inserted, for liquids with higher concentration and viscosity, more extrusion assemblies 8 can be inserted to extrude the hose 2 and disperse the pressure of the hose 2. After the new extrusion assembly 8 is added, the first rotary drive member 301 is controlled to drive the rod body 503 to rotate in the opposite direction, driving the drive assembly 3 and the moving assembly 5 to restore to the original position of extruding the hose 2, and the first clamp 506 will withdraw from the inclined slot, allowing the bracket 404, the vertical rod 405, the lifting disc 402 and the electromagnetic disk 403 to descend and contact the second electromagnet 804, and the compressed third spring 409 will drive the lifting conductive rod 407 to contact the electrical connector 406 again and energize, and the electromagnetic disk 403 will be magnetically adsorbed to the second electromagnet 804 again, and the first electromagnet 307 will be magnetically adsorbed to the slide bar 308 (the first rotary drive member 301 drives the main shaft 303 to rotate to maintain stability); 3. Increase hardness: After the new extrusion assembly 8 is inserted, the extrusion assembly 8 will be driven to move back to the original position of the extrusion hose 2, and the elastic electrical contact 614 will contact the conductive ring 613 and energize, so that the electromagnetic device is energized to generate a magnetic field, so that the hardness of the magnetorheological fluid in the extrusion roller 803 increases. When the concentration and viscosity of the detected liquid increase, the controller can control the voltage transmitted to the conductive ring 613 to increase, so that the magnetic force of the magnetic field generated by the electromagnetic device is increased, and the hardness of the magnetorheological fluid in the extrusion roller 803 is further increased, so that the extrusion roller 803 can maintain a stable shape under greater pressure, and better produce an extrusion and push effect on high-viscosity samples; It should be noted that magnetorheological fluid is a new type of fluid with controllable fluidity and is a relatively actively studied branch of smart materials. It exhibits low-viscosity Newtonian fluid characteristics when there is no external magnetic field, and exhibits high-viscosity, low-fluidity Bingham fluid when an external magnetic field is applied. There is a corresponding relationship between the viscosity of the liquid and the magnetic flux. The hardness change of the extrusion roller 803 is proportional to the extrusion strength, the viscosity of the magnetorheological fluid and the size of the magnetic field. Compared with replacing the hose 2 when conveying liquids with higher concentrations (replacing the hose 2 usually involves disassembly, reinstallation and other processes, which not only increases the complexity of maintenance, but also requires additional costs and time), increasing the hardness of the extrusion roller 803 to extrude the hose 2 is more applicable (increasing the hardness of the extrusion roller 803 can more flexibly respond to changes in liquid viscosity, especially for high-viscosity liquids. When the liquid viscosity is high, the harder extrusion roller can provide greater extrusion force to ensure that the liquid can pass through the hose smoothly).

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A peristaltic pump for experimental testing, characterized in that: include: Pump housing (1); A hose (2) is fixedly mounted on the inner wall of the pump housing (1), and the hose (2) is provided with a water inlet and a water outlet; A driving component (3), wherein a slide groove (310) is provided in the pump housing (1), a displacement block (302) is slidably mounted in the slide groove (310), a short shaft is rotatably mounted in the displacement block (302), a main shaft (303) is fixedly mounted on the upper end of the short shaft, and a plurality of extrusion components (8) are rotatably mounted on the outer wall of the main shaft (303), and the extrusion components (8) roll the hose (2); A fixing assembly (4) used for fixing the extrusion assembly (8) on the outer wall of the main shaft (303); The moving assembly (5) is used to drive the plurality of driving assemblies (3) to move linearly, the moving assembly (5) comprising a mounting seat (508) arranged on one side of 303, the mounting seat (508) being used to load a spare extrusion assembly (8).

2. A peristaltic pump for experimental testing according to claim 1, characterized in that: A first rotary drive member (301) is fixedly mounted on the lower end surface of the displacement block (302); an output end of the first rotary drive member (301) penetrates the displacement block (302) and is fixedly connected to the short shaft; an annular groove (306) is provided on the outer wall of the main shaft (303); an annular clamping groove is provided on the upper and lower inner walls of the annular groove (306); a plurality of first springs (305) are fixedly mounted in a circular array in the inner circumference of the annular clamping groove; a clamping ring (304) is fixedly mounted on the plurality of first springs (305) symmetrically in upper and lower parts thereof, and the clamping ring (304) is slidably connected to the annular groove; The extrusion assembly (8) comprises a second chuck (801) rotatably mounted on the inner wall of the annular groove (306), the upper and lower ends of the second chuck (801) being provided with grooves, a joint (802) being fixedly mounted on one end of the second chuck (801) away from the axis of the main shaft (303), an extrusion roller (803) being rotatably mounted inside the joint (802), second electromagnets (804) being symmetrically mounted at upper positions on both sides of the joint (802), second electromagnets (804) of magnetic repulsion engagement being respectively fixed on opposite sides of two adjacent joints (802), and the second electromagnets (804) being electrically connected to a controller.

3. A peristaltic pump for experimental testing according to claim 2, characterized in that: First electromagnets (307) are symmetrically fixedly installed on both sides of the displacement block (302), and the first electromagnets (307) are electrically connected to a controller. Two sliding rods (308) are symmetrically installed on the inner wall of the slide groove (310), and the sliding rods (308) are slidably connected to the first electromagnets (307). A second spring (309) is fixedly installed between the displacement block (302) and the slide groove.

4. A peristaltic pump for experimental testing according to claim 3, characterized in that: The upper end of the main shaft (303) is in contact with a fixed box (401), the inner wall of the fixed box (401) is vertically slidably mounted with a lifting disc (402), the outer wall of the lifting disc (402) is fixedly mounted with an electromagnetic disk (403), the electromagnetic disk (403) is electrically connected to a controller, the electromagnetic disk (403) and the second electromagnet (804) are magnetically matched, the upper end of the lifting disc (402) is fixedly mounted with a bracket (404), an inclined groove is provided in the bracket (404), an electric connector (406) is fixedly mounted on the inner bottom end of the inclined groove, the electric connector (406) is connected to the electromagnetic disk (403) and the first electromagnet (30 7) Electrical connection, a lifting conductive rod (407) is slidably installed at the inner top end of the inclined groove, and the lifting conductive rod (407) is electrically connected to an external power supply. The upper end of the lifting conductive rod (407) passes through the bracket (404), and a U-shaped frame (408) is fixedly installed at the upper end of the bracket (404). A third spring (409) is fixedly installed between the U-shaped frame (408) and the lifting conductive rod (407). L-shaped brackets (410) are symmetrically fixedly installed on both sides of the bracket (404), and a vertical sliding rod (411) is slidably installed at the lower end of the L-shaped bracket (410), and the vertical sliding rod (411) is fixedly connected to the pump housing (1).

5. A peristaltic pump for experimental testing according to claim 3, characterized in that: The moving assembly (5) comprises a vertical plate (501) fixedly mounted on the lower end surface of the pump housing (1); a rod body (503) is rotatably mounted on one side of the vertical plate (501); a second rotating driving member (502) is fixedly mounted on the other side of the vertical plate (501); the second rotating driving member (502) is electrically connected to a controller; an output end of the second rotating driving member (502) passes through the vertical plate (501) and is fixedly connected to the rod body (503); a first thread groove and a second thread groove having opposite thread directions are formed on an outer wall of the rod body (503); the second thread groove is arranged near a mounting seat (508); the pitch of the first thread groove is greater than the pitch of the second thread groove; a moving plate (507) is threaded on the outer wall of the rod body (503) at the second thread groove; and the upper end of the moving plate (507) is fixedly connected to the mounting seat (508).

6. A peristaltic pump for experimental testing according to claim 5, characterized in that: A movable frame (504) is slidably mounted on the outer wall of the first electromagnet (307); one end of the rod body (503) passes through the movable frame (504) and is threadedly connected via a first thread groove; a U-shaped displacement bracket (505) is fixedly mounted on one side of the movable frame (504); a first clamp (506) is integrally formed at the upper end of the U-shaped displacement bracket (505) and at a position corresponding to the inclined groove.

7. A peristaltic pump for experimental testing according to claim 1, characterized in that: The device further comprises a detection component (6), the detection component (6) comprising a mounting plate (601) fixedly mounted on the outer wall of the hose (2) and at the water inlet, the mounting plate (601) having an irradiation lamp (602) embedded therein, a sealing cover (603) fixedly mounted on the inner wall of the hose (2) and at a position corresponding to the irradiation lamp (602), a light source detection element (604) fixedly mounted inside the sealing cover (603) and at a position corresponding to the irradiation lamp (602), and the light source detection element (604) being electrically connected to a controller.

8. A peristaltic pump for experimental testing according to claim 2, characterized in that: The outer wall of the hose (2) is connected to an external pipe (605) at the water inlet, a water inlet plate (606) is fixedly mounted on one end of the external pipe (605), a water inlet hole is provided inside the water inlet plate (606), a water outlet plate (607) is fixedly mounted on the other end of the external pipe (605), a water outlet plate (607) is provided inside the water outlet plate (607), the number of the water inlet holes is greater than the number of the water outlet holes, a flow channel plate (608) is fixedly mounted on the inner wall of the external pipe (605) and at a position close to the water inlet plate (606), a curved flow groove is provided inside the flow channel plate (608) A sealing plate (609) is airtightly and slidably mounted on one side of the external tube (605), two plug plates (612) are symmetrically mounted on one side of the sealing plate (609), two clamping seats (610) are symmetrically mounted on one side of the external tube (605), the plug plates (612) are slidably connected to the clamping seats (610), a viscosity detection element (611) is fixedly mounted on one side of the sealing plate (609), the viscosity detection element (611) is electrically connected to the controller, and a detection end of the viscosity detection element (611) passes through the sealing plate (609) and extends into the external tube (605); A conductive ring (613) is fixedly mounted on the inner bottom end of the pump housing (1), the conductive ring (613) being electrically connected to a controller, the extrusion roller (803) being filled with magnetorheological fluid, an electromagnetic device being fixedly mounted on the inner bottom end of the extrusion roller (803), an elastic electric contact (614) being fixedly connected to the lower end of the connector (802), the electromagnetic device being electrically connected to the elastic electric contact (614), and the elastic electric contact (614) being electrically connected to the conductive ring (613).

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