Peristaltic pump flow calculation control structure

Abstract

The application provides a flow calculation control structure of a peristaltic pump, which comprises a magnetic ring, a Hall component, a base shell, a cover, a brake ring, a friction ring and a driving piece. The magnetic ring is connected to an output shaft at one end of a motor. A conveying pipe is connected to the other end of the motor. A plurality of pairs of magnetic poles are arranged on the magnetic ring. The Hall component is located on one side of the magnetic ring to sense switching of the magnetic poles of the magnetic ring to calculate the number of rotation circles and then calculate the flow of the peristaltic pump. The brake ring is connected to the output shaft of the motor and located on the same side as the magnetic ring. The motor is arranged in the base shell. The cover is wrapped around the outer periphery of the magnetic ring and the brake ring and connected to the base shell. The friction ring is movably arranged on the inner wall of the cover. The driving piece is used to drive the friction ring to move, so as to control the friction ring to contact or move away from the brake ring. The driving piece controls the opening and closing of the liquid inlet check valve or the liquid outlet check valve on the conveying pipe through a connecting rod assembly. The multi-pole magnetic ring can calculate more accurate number of circles, and the control of the flow is more accurate.

Description

[0001] The application is a divisional application, the original application has the application number of "202111640640.5", the application date of "2021.12.29", and the invention name of "Flow precision control peristaltic pump". TECHNICAL FIELD

[0002] The application relates to the field of peristaltic pump components, in particular to a flow calculation control structure of a peristaltic pump. BACKGROUND

[0003] The peristaltic pump extrudes a soft tube filled with fluid through a roller, and the fluid in the tube moves forward as the roller slides forward. The fluid is pumped by the extrusion and release of the soft tube by the multiple rollers in an alternating manner. Many peristaltic pumps need to detect and control the flow, but the precision of the flow control of the peristaltic pump in the prior art is not high.

[0004] Therefore, a flow calculation control structure of a peristaltic pump is needed to solve the above technical problems. SUMMARY

[0005] The application provides a flow calculation control structure of a peristaltic pump to solve the problem of low precision of flow control of the peristaltic pump in the prior art.

[0006] To solve the above technical problems, the technical scheme of the application is as follows: a flow calculation control structure of a peristaltic pump, comprising a magnetic ring, a Hall component, a circuit component, a base shell, a cover, a brake ring, a friction ring and a driving piece, the magnetic ring is connected to the output shaft of the motor, the other end of the motor is connected with a conveying pipe, a plurality of pairs of magnetic poles are arranged on the magnetic ring, the Hall component is located on one side of the magnetic ring, the circuit component is electrically connected with the motor and the Hall component, the Hall component is used for sensing the switching of the magnetic poles of the magnetic ring to calculate the number of revolutions, and then the flow of the peristaltic pump is calculated.

[0007] The brake ring is connected to the output shaft of the motor and located on the same side as the magnetic ring, the motor is arranged in the base shell, the cover is wrapped around the outer periphery of the magnetic ring and the brake ring and connected with the base shell, the friction ring is movably arranged on the inner wall of the cover, the driving piece is connected with the base shell and used for driving the friction ring to move, so as to control the friction ring to contact or move away from the brake ring, at least one liquid inlet check valve or liquid outlet check valve is arranged on the conveying pipe, and the driving piece controls the opening and closing of the liquid inlet check valve or the liquid outlet check valve through the connecting rod assembly.

[0008] In the present application, two ends of the conveying pipe are liquid inlet and liquid outlet respectively, a liquid inlet check valve is connected to the liquid inlet, a liquid outlet check valve is connected to the liquid outlet, a liquid inlet switch handle for controlling opening and closing is rotatably arranged on the liquid inlet check valve, a liquid outlet switch handle for controlling opening and closing is rotatably arranged on the liquid outlet check valve, the driving member is connected to the liquid inlet switch handle and the liquid outlet switch handle through a connecting rod assembly;

[0009] When the driving member controls the friction ring to contact the brake ring, the connecting rod assembly drives the liquid inlet switch handle to close, and the connecting rod assembly drives the liquid outlet switch handle to close;

[0010] When the driving member controls the friction ring to be away from the brake ring, the connecting rod assembly drives the liquid inlet switch handle to open, and the connecting rod assembly drives the liquid outlet switch handle to open.

[0011] Wherein, two ends of the friction ring are symmetrically provided with lugs, the lugs extend through the cover body, the connecting rod assembly comprises a driving plate and first connecting plates symmetrically arranged at two ends of the driving plate, the driving member is connected to the driving plate, and one first connecting plate corresponds to one lug;

[0012] The liquid inlet and the liquid outlet of the conveying pipe extend from the same side of the shell, the connecting rod assembly further comprises a second connecting plate, one end of the second connecting plate is connected to the driving plate, the other end is provided with two supporting rods on both sides, the supporting rods are provided with long strip-shaped grooves, and the liquid inlet switch handle and the liquid outlet switch handle are movably connected to one long strip-shaped groove through a rotating shaft respectively.

[0013] Further, one side surface of the base shell is an arc surface, the driving plate is an arc plate, and the driving plate is slidably attached to the surface of the base shell.

[0014] Further, the base shell is provided with a first sliding sleeve, the first connecting plate penetrates through the first sliding sleeve and forms a sliding connection, the shell is provided with a second sliding sleeve, and the second connecting plate penetrates through the second sliding sleeve and forms a sliding connection.

[0015] In addition, the end of the first connecting plate is provided with a clamping column, and the connecting rod assembly further comprises a screw rod, a nut, a rotating ring and a rotating cover.

[0016] The screw head of the screw is provided with a connecting hole for clamping with the clamping column, the nut is threadedly connected with the screw, the lug is provided with an open slot, the periphery of the open slot is provided with an adapter protrusion, the rotating ring is rotationally connected with the adapter protrusion, and the rotation axis is consistent with the axial center line of the screw, the rotating ring is a non-closed ring with a broken section, the rotating cover is fixedly connected with the rotating ring, the screw penetrates through the open slot and the rotating cover, and the rotating cover wraps the nut to drive the nut to rotate.

[0017] Further, the rotating ring is provided with a fixing column, and the rotating cover is provided with a fixing hole matched with the fixing column.

[0018] Optionally, the end of the first connecting plate is provided with a clamping column, and the connecting rod assembly further comprises a screw, a nut and a spring.

[0019] The screw head of the screw is provided with a connecting hole for clamping with the clamping column, the spring is sleeved on the screw, the screw penetrates through the lug, the nut is threadedly connected with the screw, and the nut and the spring are located on the two sides of the lug respectively.

[0020] Compared with the prior art, the flow calculation control structure of the peristaltic pump can calculate more precise number of turns by using a multi-pole magnetic ring, and the control of flow is more accurate.

[0021] In addition, by setting the driving member, the friction ring is driven to contact or move away from the brake ring, the liquid inlet switch handle is driven to open or close the liquid inlet check valve, and the liquid outlet switch handle is driven to open or close the liquid outlet check valve, so that when the motor stops working, the synchronous rotating frame can be stably kept in a stationary state, and fluid backflow is prevented, and the accuracy of flow control is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments are briefly introduced as follows, and the drawings in the following description are only corresponding drawings of some embodiments of the present application.

[0023] Figure 1 It is a structural schematic view of the first embodiment of the flow accurate control peristaltic pump of the present application.

[0024] Figure 2 It is a structural schematic view of the first embodiment of the flow accurate control peristaltic pump of the present application. Figure 1 It is an enlarged view of the local structure at A in the above figure.

[0025] Figure 3 It is a structural schematic view of the rotating frame and the roller in the first embodiment.

[0026] Figure 4This is a cross-sectional view of the rotating frame and rollers in the first embodiment for adjusting the assembly.

[0027] Figure 5 for Figure 4 Enlarged view of the local structure at point B.

[0028] Figure 6 for Figure 5 A schematic diagram of another state of the structure.

[0029] Figure 7 This is a schematic diagram of the second embodiment of the peristaltic pump for precise flow control according to the present invention.

[0030] Figure 8 This is a schematic diagram of the magnetic ring, braking ring, and friction ring in the second embodiment.

[0031] Figure 9 This is a schematic diagram of the cooperation between the magnetic ring and the Hall component in the second embodiment.

[0032] Figure 10 for Figure 7 Enlarged view of the local structure at point C.

[0033] Figure 11 This is a schematic diagram of the lug, rotating ring, and rotating cover in the second embodiment.

[0034] Figure 12 This is a schematic diagram of the connection structure between the second connecting plate and the liquid inlet switch handle and the liquid outlet switch handle in the second embodiment. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0037] The terms "first" and "second" used in the terminology of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as limiting the order of events.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, the connection can be detachable connection, or integral structure connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] A peristaltic pump is a device for conveying liquid by roller extrusion of a hose. The fluid in the hose is moved forward by the roller extrusion of a hose filled with fluid, and the fluid is pumped by the alternating extrusion and release of the hose by multiple rollers. In order to prevent backflow of the liquid, sealing must be obtained by maintaining pressure on the hose through the rollers. The pressure depends on the tightness of the roller pressing on the hose. The looser the hose is pressed, the smaller the pressure is, and the longer the service life of the hose is. However, the conveying effect may not meet the requirements. On the contrary, the tighter the hose is pressed, the greater the pressure is. When pressed to a certain extent, the hose will be subjected to relatively large pressure fatigue wear, and the service life of the hose will be short. In the prior art, due to the need for a certain pressure between the roller and the hose, it is difficult to assemble them, and the pressure relationship after assembly is fixed and cannot be adjusted. In addition, the poor cooperation between the components will also lead to inaccurate flow control.

[0040] On the other hand, many peristaltic pumps need to detect and control the flow. However, the accuracy of the flow control of the peristaltic pump in the prior art is not high. The pressure between the roller and the hose is often not ideal due to manufacturing, assembly and other deviations, which is also one of the factors leading to low flow accuracy.

[0041] The following is a first embodiment of a flow accurate control peristaltic pump provided by the present application to solve the above technical problems.

[0042] Please refer to Figure 1 , Figure 2 and Figure 3 , wherein Figure 1 is a structural schematic diagram of the first embodiment of the flow accurate control peristaltic pump of the present application, Figure 2 is Figure 1 a local structure enlargement diagram of A, Figure 3 is a structural schematic diagram of the rotating frame and the roller in the first embodiment.

[0043] In the drawings, similar structures are denoted by the same reference numerals.

[0044] The present application provides a flow accurate control peristaltic pump, which comprises a rotating frame 16, a motor 11, a roller 17, a housing 121 and a conveying pipe 14.

[0045] The motor 11 is connected with the rotating frame 16 to drive the rotating frame 16 to rotate, and it can be understood that the motor 11 and the rotating frame 16 can be connected through a gear system, and the gear transmission mode is a relatively mature prior art, which will not be described here.

[0046] The roller 17 is rotatably arranged on the periphery of the rotating frame 16, and the rotation axis of the roller 17 is parallel to the rotation axis of the rotating frame 16; the shell 121 is wrapped outside the rotating frame 16, and the shell 121 is connected with the motor 11, and the motor 11 is arranged in the corresponding base shell 122.

[0047] The conveying pipe 14 is arranged around the periphery of the rotating frame 16 and is extruded between the wheel surface of the roller 17 and the inner wall surface of the shell 121, and the rotating frame 16 rotates to make the roller 17 roll and extrude along the conveying pipe 14, thereby driving the liquid in the conveying pipe 14 to flow.

[0048] In this embodiment, the peristaltic pump further comprises an adjusting assembly, and the rotating frame 16 comprises a fixed frame 161 and a movable frame 162.

[0049] The movable frame 162 is slidably arranged on the periphery of the fixed frame 161, the roller 17 is rotatably arranged on the inner side of the movable frame 162, the axes of a plurality of the rollers 17 are located on the same configuration circle, the sliding direction of the movable frame 162 is along the diameter direction of the configuration circle, the adjusting assembly is arranged on the shell 121, and the adjusting assembly is connected with the movable frame 162 and used to drive the movable frame 162 to slide, so as to adjust the distance between the rollers 17, that is, to adjust the diameter of the configuration circle, and the larger the diameter of the configuration circle, the more extrusion of the roller 17 to the conveying pipe 14.

[0050] Before assembly, the diameter of the configuration circle of the roller 17 is adjusted to be small, so that the assembly is easier, and after assembly, the diameter of the configuration circle of the roller 17 is adjusted according to the use effect and demand, so that the pressure of the roller 17 to the conveying pipe 14 is moderate, the service life of the conveying pipe is longer, and the conveying precision is higher and the extrusion conveying efficiency is good, so that the conveying demand can be met.

[0051] Please refer to Figure 3 and Figure 4 In the present application, the adjusting assembly comprises a screw rod 14, a connecting rod 18 and a connecting piece 19.

[0052] The connecting piece 19 is located inside the fixed frame 161, the circumferential side of the connecting piece 19 is movably connected with the corresponding movable frame 162 through the connecting rod 18, the screw rod 14 is threadedly connected with the shell 121, and the screw rod 14 is rotationally connected with the side of the connecting piece 19 away from the connecting rod 18, that is Figure 4 In the embodiment, the connecting rod 18 is in a drooping state relative to the connecting piece 19, the screw rod 14 is connected with the top surface of the connecting piece 19, and when the screw rod 14 rotates downward, the movable frame 162 can be extruded outwardly and expanded in a circumferential direction through the connecting piece 19 and the connecting rod 18, so that the extrusion amount of the conveying pipe 14 can be increased.

[0053] It is conceived that, since the rotating frame 16 rotates relative to the shell 121 during operation, the screw rod 14 can be connected with the connecting piece 19 through a bearing, for example, the screw rod 14 is connected with the connecting piece 19 through a plain bearing 1A in the embodiment.

[0054] In the embodiment, the fixed frame 161 is provided with a mounting hole 1614, and the adjusting assembly further includes a spring 1B, the spring 1B and the connecting piece 19 are located in the mounting hole 1614, the spring 1B is connected between the bottom wall of the mounting hole 1614 and the connecting piece 19, the spring 1B is located on the side opposite to the screw rod 14, and the spring 1B is always in a compressed state during the sliding stroke of the movable frame 162, and the plain bearing 1A can automatically keep in contact with the connecting piece 19.

[0055] Further, the fixed frame 161 includes a fixed cylinder 1612 and parallelly arranged bottom plate 1613 and top plate 1611, the fixed cylinder 1612 is arranged between the bottom plate 1613 and the top plate 1611, and the mounting hole 1614 penetrates through the top plate 1611 and the fixed cylinder 1612.

[0056] In the embodiment, the bottom plate 1613 and the top plate 1611 are both provided with a sliding groove 1615 for limiting the sliding of the movable frame 162, the movable frame 162 is provided with a sliding block matched with the sliding groove 1615, and the stable movement of the movable frame 162 is ensured. Figure 3 The side wall of the fixed cylinder 1612 is provided with a through groove, and the connecting rod 18 can extend into the mounting hole 1614 through the through groove.

[0057] In the embodiment, the connecting piece 19 includes a first locking piece 191 and a second locking piece 192, both sides of the end of the connecting rod 18 away from the movable frame 162 are provided with rotating columns 181, the first locking piece 191 and the second locking piece 192 clamp the rotating columns 181, so that the rotating columns 181 are rotationally connected with the connecting piece 19, and it can be understood that the first locking piece 191 and the second locking piece 192 are both provided with grooves matched with the rotating columns 181.

[0058] In this embodiment, the mounting hole 1614 is a square hole, and the connecting piece 19 is a square structure, so that the first locking piece 191 and the second locking piece 192 can be oriented to slide along the mounting hole 1614, and the oriented sliding facilitates the positive docking of the rotating column and the connecting piece 19. During installation, the spring 1B is first installed into the mounting hole 1614, then the first locking piece 191 is installed into the mounting hole 1614, the connecting rod 18 is extended into the mounting hole 1614, and then the second locking piece 192 is installed into the mounting hole 1614, and the first locking piece 191 and the second locking piece 192 can be locked by screw connection, so as to lock the rotating column 181 between the first locking piece 191 and the second locking piece 192.

[0059] It is easily conceivable that the mounting hole 1614 can also be designed as a circular hole, and a positioning sliding groove is arranged on the hole wall, and a positioning protrusion corresponding to the positioning sliding groove is arranged on one side of the connecting piece 19, so as to facilitate the positive assembly of the connecting piece 19 and the connecting rod 18.

[0060] Please refer to Figure 2 , Figure 5 and Figure 6 In the present application, the adjusting assembly further comprises a rotating piece 15 movably connected to the housing 121, and the screw rod 14 is threadedly connected to the rotating piece 15. The rotating piece 15 comprises a clamping position and a rotating position on the movable track of the housing 121. The clamping position is closer to the connecting piece 19 than the rotating position, that is, as shown in Figure 5 , the rotating piece 15 can slide downward to the clamping position.

[0061] When the rotating piece 15 is located at the rotating position, the rotating piece 15 can rotate relative to the housing 121, and the rotation axis of the rotating piece 15 is coaxial with the axial center line of the screw rod 14, so that the screw rod 14 and the rotating piece 15 have an anti-loosening effect. At the same time, due to the presence of the spring 1B, the rotating piece 15 can be elastically pressed to remain at the rotating position, and rotating the screw rod 14 will form idling.

[0062] It is easily conceivable that a ball, lubricating oil or the like can be arranged between the rotating piece 15 and the inner wall of the accommodating groove 1211, so that the rotating piece can idle more smoothly, and the anti-loosening effect of the screw rod is improved.

[0063] When the rotating piece 15 is located at the clamping position, the rotating piece 15 cannot rotate relative to the housing 121, so that the screw rod 14 and the rotating piece 15 can rotate relative to each other. By applying an external force to control the downward movement of the rotating piece 15 by a certain distance, the rotating piece 15 moves to the clamping position, and at this time the screw rod 14 can be rotated, so as to adjust the pressing amount of the screw rod 14 on the connecting piece 19, and further adjust the pressing amount of the roller 17 on the conveying pipe 14.

[0064] Please refer to Figure 5In the embodiment, the shell 121 is provided with a containing groove 1211 for mounting the rotating piece 15, the rotating piece 15 is provided with a clamping tooth 154 on the circumferential side, and the inner wall of the containing groove 1211 is provided with a clamping groove 1212 corresponding to the clamping tooth 154. When the rotating piece 15 is in the clamping position, the clamping tooth 154 and the clamping groove 1212 are connected, and when the rotating piece 15 is in the rotating position, the clamping tooth 154 and the clamping groove 1212 are out of position.

[0065] In the embodiment, the rotating piece 15 comprises a pressing part 151, the pressing part 151 extends outwardly from the shell 121, and the pressing part 151 is used for being pressed to make the rotating piece 15 slide to the clamping position, so that the operation is convenient.

[0066] The opposite sides of the rotating piece 15 are both provided with the pressing part 151, the end of the pressing part 151 away from the rotating piece 15 is provided with a blocking piece 152, the first end of the blocking piece 152 is located on the side of the pressing part 151 away from the shell 121, the second end of the blocking piece 152 is located on the side of the pressing part 151 close to the shell 121, a torsion spring 155 is arranged on the rotation axis between the blocking piece 152 and the pressing part 151, and the blocking piece 152 comprises a locking position and an unlocking position on the rotation track.

[0067] As shown in FIG. 1, Figure 5 When the blocking piece 152 is in the locking position, the second end of the blocking piece 152 is limited between the pressing part 151 and the shell 121, so that the rotating piece 15 is limited to slide to the clamping position, and the torsion spring 155 drives the rotating piece 15 to remain in the locking position. It can be understood that the blocking piece 152 is rotationally arranged in the mounting groove at one end of the pressing part 151, when the blocking piece 152 is in the locking position, the blocking piece 152 is in an inclined state relative to the surface of the shell 121, and the blocking piece 152 is in contact with the inner wall of the mounting groove, so that the blocking piece 152 cannot be rotated to a more inclined direction.

[0068] When the blocking piece 152 is in the locking position, the upper surface of the rotating piece 15 is in contact with the inner top surface of the containing groove 1211, so that a certain external force needs to be applied to extrude the pressing part 151 to deform, so as to rotate the blocking piece 152 outwardly to be unlocked, thereby ensuring that the blocking piece 152 can be stably located in the locking position.

[0069] As shown in FIG. 1, Figure 6 When the blocking piece 152 is in the unlocking position, the first ends of the two blocking pieces 152 on the two pressing parts 151 are close to each other, so that the second ends of the blocking pieces 152 are rotated outwardly, and then the pressing part 151 can be close to the shell 121, and the rotating piece 15 can slide to the clamping position.

[0070] The first end of the blocking piece 152 in the embodiment is arc-shaped, the first end of the blocking piece 152 is concave on the side close to the screw piece 14, the pressing part 151 is provided with a clearance hole 153 for avoiding the second end of the blocking piece 152, so that when the blocking piece 152 slides to the unlocking position, the bottom end of the blocking piece 152 can be farthest away from the shell 121, and the space utilization is higher.

[0071] When the flow precision control peristaltic pump in the embodiment is assembled for use, the roller 17, the fixed frame 161, the movable frame 162, the connecting piece 19 and the spring 1B are connected and assembled first, at this time, under the elastic extrusion force of the spring 1B, the plurality of rollers 17 slide inward and gather, and the diameter of the structure circle where the axes of the plurality of rollers 17 are located is smallest, so that the assembly with the shell 121 is facilitated.

[0072] On the other hand, the shell 121, the rotating piece 15 and the screw piece 14 are connected and assembled, then the conveying pipe 13 is wound around the outer periphery of the roller 17, and then the shell 121 is connected and assembled, after the assembly, the blocking piece 152 can be pressed to be located at the unlocking position, and the rotating piece 15 is driven to slide to the clamping position by force, at this time, the clamping teeth 154 and the clamping groove 1212 are in butt joint, so that the screw piece 14 can be rotated, so as to adjust the extrusion amount of the connecting piece 19 by the screw piece 14, and then adjust the extrusion amount of the conveying pipe 14 by the roller 17.

[0073] After the flow precision control peristaltic pump in the embodiment is assembled, the position between the fixed frame and the movable frame can be adjusted through the adjusting assembly, so that the extrusion amount of the roller to the conveying pipe can be adjusted, which facilitates the assembly, and at the same time, the pressure between the roller and the conveying pipe can be adjusted according to the fluid output condition, so as to achieve the purpose of precision control of the flow.

[0074] Please refer to Figure 7 and Figure 8 The following is a second embodiment of a flow precision control peristaltic pump provided by the application which can solve the above technical problems.

[0075] A flow precision control peristaltic pump comprises a rotating frame, a motor 21, a roller, a shell 23 and a conveying pipe 26.

[0076] The motor 21 is connected with the rotating frame to drive the rotation thereof; the roller is rotationally arranged on the side of the rotating frame, and the rotation axis of the roller is parallel to the rotation axis of the rotating frame; the shell 23 is wrapped outside the rotating frame, the shell 23 is connected with the motor 21, the conveying pipe 26 is annularly arranged on the side of the rotating frame, and is extruded between the surface of the roller and the inner wall surface of the shell 23, the rotation of the rotating frame makes the roller roll and extrude along the conveying pipe 26, and then drives the liquid in the conveying pipe 26 to flow, the structure and principle of pumping the fluid are consistent with those of the first embodiment, so the drawings of the first embodiment can be referred to.

[0077] In the embodiment, the motor 21 has an output shaft extending from both ends, and the output shaft at one end of the motor 21 is connected to the rotating frame. It can be understood that the motor 21 and the rotating frame can be connected through a transmission system, such as a planetary gear system. The output shaft at the other end is connected to the magnetic ring 27. The peristaltic pump further comprises a Hall assembly 2A. The magnetic ring 27 is provided with a plurality of pairs of magnetic poles. The Hall assembly 2A is located on one side of the magnetic ring 27. The Hall assembly 2A is used to sense the switching of the magnetic poles of the magnetic ring 27 to calculate the number of rotations, and then calculate the flow rate of the peristaltic pump. The use of a multi-pole magnetic ring can calculate more accurate number of rotations, and the control of the flow rate is also more accurate.

[0078] One end of the motor 21 is connected to a circuit assembly 211. The circuit assembly 211 is electrically connected to the motor 21 and the Hall assembly 2A.

[0079] Please refer to Figure 7 and Figure 8 In the embodiment, the peristaltic pump further comprises a base shell 221, a cover 222, a brake ring 28, a friction ring 29, and a driving member 24.

[0080] The brake ring 28 is connected to the output shaft of the motor 21 and located on the same side as the magnetic ring 27. The motor 21 is arranged in the base shell 221. The cover 222 is wrapped around the outer periphery of the magnetic ring 27 and the brake ring 28 and connected to the base shell 221. The friction ring 29 is movably arranged on the inner wall of the cover 222. The driving member 24 is connected to the base shell 221 and used to drive the friction ring 29 to move, so as to control the friction ring 29 to contact or move away from the brake ring 28.

[0081] The two ends of the conveying pipe 26 are respectively an inlet and an outlet. The peristaltic pump further comprises an inlet check valve 261 and an outlet check valve 262. The inlet check valve 261 is connected to the inlet, and the outlet check valve 262 is connected to the outlet. The inlet check valve 261 is rotatably provided with an inlet switch handle 2611 for controlling opening and closing. The outlet check valve 262 is rotatably provided with an outlet switch handle 2621 for controlling opening and closing. The driving member 24 is connected to the inlet switch handle 2611 and the outlet switch handle 2621 through a linkage assembly.

[0082] When the driving member 24 controls the friction ring 29 to contact the brake ring 28, the linkage assembly drives the inlet switch handle 2611 to close, and the linkage assembly drives the outlet switch handle 2621 to close.

[0083] When the driving member 24 controls the friction ring 29 to move away from the brake ring 28, the linkage assembly drives the inlet switch handle 2611 to open, and the linkage assembly drives the outlet switch handle 2621 to open.

[0084] Thus, when the motor 21 stops working, the friction ring 29 can be in contact with the brake ring 28 to ensure stable stop of the output shaft of the motor 21, and the drive control liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 are closed to prevent backflow of the fluid and improve the accuracy of flow control. The same drive member 24 is used to drive two structures, which is low in cost, high in efficiency, and good in synchronism.

[0085] In the embodiment, please refer to Figure 7 and Figure 10 . The friction ring 29 is symmetrically provided with lugs 291 at two ends, which extend through the cover 222. As Figure 10 , the cover 222 is provided with a through slot for the lugs 291 to extend through, and one side of the through slot is an open end that is not closed, facilitating installation of the lugs, and the open end of the through slot is shielded by the base shell 221.

[0086] Please refer to Figure 7 , the connecting rod assembly includes a drive plate 251 and first connecting plates 252 symmetrically arranged at two ends of the drive plate 251, the drive member 24 is connected with the drive plate 251, and one first connecting plate 252 corresponds to one lug 291. The drive member 24 can be a linear drive device such as an existing electric push rod or an electric cylinder.

[0087] Please refer to Figure 12 , the liquid inlet and the liquid outlet of the conveying pipe 26 extend from the same side of the shell 23, and the connecting rod assembly further includes a second connecting plate 253, one end of the second connecting plate 253 is connected with the drive plate 251, and the other end is provided with two supporting rods (as Figure 12 , the two supporting rods can also be connected as an integral structure) on both sides, the supporting rods are provided with long slots 2531, the liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 are respectively movably connected with one long slot 2531 through shafts 2532, so that the opening and closing of the liquid inlet check valve 261 and the liquid outlet check valve 262 can be controlled during the up and down movement of the second connecting plate 253.

[0088] The surface of one side of the base shell 221 is arc-shaped, and the drive plate 251 is an arc-shaped plate, which is slidably flat on the surface of the base shell 221, stable in sliding.

[0089] In addition, the base shell is provided with a first sliding sleeve 223, the first connecting plate 252 penetrates through the first sliding sleeve 223 and forms a sliding connection, and the shell 23 is provided with a second sliding sleeve 231, the second connecting plate 253 penetrates through the second sliding sleeve 231 and forms a sliding connection, providing stability for driving sliding.

[0090] Please refer to Figure 11In the embodiment, the end of the first connecting plate 252 is provided with a clamping column 2521, and the connecting rod assembly further includes a screw rod 2B1, a nut, a rotating ring 2B3, and a rotating cover 2B2.

[0091] The screw rod head of the screw rod 2B1 is provided with a connecting hole for clamping with the clamping column 2521, and the nut is threadedly connected with the screw rod 2B1.

[0092] The lug 291 is provided with an open slot 2911, and a transition protrusion 2912 is arranged on the periphery of the open slot 2911. The rotating ring 2B3 is rotationally connected with the transition protrusion 2912, and the rotation axis is consistent with the axial center line of the screw rod 2B1. The rotating ring 2B3 is a non-closed ring with a broken portion, facilitating assembly. The rotating cover 2B2 is fixedly connected with the rotating ring 2B3. The screw rod 2B1 penetrates the open slot 2911 and the rotating cover 2B2. The rotating cover 2B2 wraps the nut to drive the nut to rotate, so as to adjust the moving stroke of the friction ring 29. The inner side of the rotating cover 2B2 is an internal hexagonal cavity matched with the nut.

[0093] The connection mode of the rotating cover 2B2 and the rotating ring 2B3 can be clamping, welding, or other conventional modes. Figure 11 A fixing column can be arranged on the rotating ring 2B3, and a fixing hole matched with the fixing column can be arranged on the rotating cover 2B2.

[0094] It can be understood that the nut can also be made into an integral non-standard structure with the rotating cover 2B2. The advantage of the split structure of the nut and the rotating cover 2B2 is that the nut is a standard part, which is low in cost, and even if the nut is damaged, the rotating cover 2B2 can continue to be used.

[0095] In addition, it should be noted that a spring can also be sleeved on the screw rod 2B1. The spring is located between the screw rod head and the lug 291. The nut and the spring are respectively located on the two sides of the lug 291. The overall cost is low, but the spring has the disadvantage of interfering with the driving of the driving member 24 due to the elastic force of the spring, and the spring is more prone to fatigue failure.

[0096] In the embodiment, the peristaltic pump can also be provided with the structure in the first embodiment. For example, the peristaltic pump can further include an adjusting assembly, and the rotating frame can further include a fixed frame and a movable frame.

[0097] The movable frame is slidingly arranged on the periphery of the fixed frame, and the rollers are rotationally arranged on the inner side of the movable frame. The axes of the plurality of rollers are located on the same construction circle. The sliding direction of the movable frame is along the diameter direction of the construction circle. The adjusting assembly is arranged on the shell 23 and connected with the movable frame, and is used to drive the movable frame to slide, so as to adjust the distance between the rollers.

[0098] The adjusting assembly includes a screw rod, a connecting rod, and a connecting piece.

[0099] The connecting piece is located inside the fixed frame, the circumferential side of the connecting piece is movably connected with the corresponding movable frame through the connecting rod, the screw piece is threadedly connected with the shell 23, and the screw piece is rotationally connected with the side of the connecting piece away from the connecting rod.

[0100] Further, the fixed frame is provided with a mounting hole, and the adjusting assembly further comprises a spring, the spring and the connecting piece are located in the mounting hole, the spring is connected between the inner wall of the mounting hole and the connecting piece, and the spring is located on the other side opposite to the screw piece. In the sliding stroke of the movable frame, the spring is always in a compressed state.

[0101] The fixed frame comprises a fixed cylinder and parallel arranged bottom plate and top plate, the fixed cylinder is arranged between the bottom plate and the top plate, and the mounting hole penetrates through the top plate and slides into the fixed cylinder.

[0102] The end of the screw piece close to the connecting piece is connected with a plane bearing, the plane bearing is in contact with the connecting piece, the connecting piece comprises a first locking piece and a second locking piece, and the two sides of the end of the connecting rod away from the movable frame are provided with rotating columns, and the first locking piece and the second locking piece rotationally clamp the rotating columns.

[0103] The specific content of adjusting the rotating frame by the adjusting assembly will not be described here, and can be referred to the first embodiment.

[0104] The working principle of the flow precision control peristaltic pump of the embodiment is as follows: the motor 21 drives the rotating frame to rotate to extrude the conveying pipe 26 to pump out the fluid, while the motor 21 is working, the driving piece 24 drives the friction ring 29 to move away from the brake ring 28, and simultaneously drives the liquid inlet switch handle 2611 to open the liquid inlet check valve 261, and drives the liquid outlet switch handle 2621 to open the liquid outlet check valve 262.

[0105] When the motor 21 stops working, the driving piece 24 receives a signal and synchronously drives the friction ring 29 to contact the brake ring 28, simultaneously drives the liquid inlet switch handle 2611 to close the liquid inlet check valve 261, and drives the liquid outlet switch handle 2621 to close the liquid outlet check valve 262, so that the rotating frame is stably in a stationary state, and the backflow of the fluid is prevented, and the control of the flow is more precise.

[0106] The flow precision control peristaltic pump of the embodiment can calculate more precise number of turns by using the multi-pole magnetic ring, and the control of the flow is more precise.

[0107] In addition, the driving piece is further arranged to drive the friction ring to contact or move away from the brake ring, drive the liquid inlet switch handle to open or close the liquid inlet check valve, and drive the liquid outlet switch handle to open or close the liquid outlet check valve, so that when the motor stops working, the rotating frame can be synchronously stably in a stationary state, the backflow of the fluid is prevented, and the precision of the control of the flow is improved.

[0108] To sum up, although the present application has been disclosed above with the above-mentioned embodiments, the above-mentioned embodiments are not used to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and therefore the protection scope of the present application is defined by the scope of the claims.

Claims

1. A flow calculation control structure of a peristaltic pump, characterized by, Including magnetic ring, hall assembly, circuit assembly, base shell, cover, brake ring, friction ring and driving piece, the magnetic ring is connected on the output shaft of the motor, the other end of the motor is connected with the conveying pipe, a plurality of pairs of magnetic poles are arranged on the magnetic ring, the hall assembly is located on one side of the magnetic ring, the circuit assembly is electrically connected with the motor and the hall assembly, the hall assembly is used for sensing the switching of the magnetic poles of the magnetic ring to calculate the rotation turns, and then the flow of the peristaltic pump is calculated; The brake ring is connected on the output shaft of the motor and located on the same side of the magnetic ring, the motor is arranged in the base shell, the cover is wrapped on the outer periphery of the magnetic ring and the brake ring and connected with the base shell, the friction ring is movably arranged on the inner wall of the cover, the driving piece is connected with the base shell and used for driving the friction ring to move, so that the friction ring contacts or moves away from the brake ring, at least one liquid inlet check valve or liquid outlet check valve is arranged on the conveying pipe, and the driving piece controls the opening and closing of the liquid inlet check valve or the liquid outlet check valve through the connecting rod assembly. Two ends of the conveying pipe are respectively a liquid inlet and a liquid outlet, the liquid inlet check valve is connected on the liquid inlet, the liquid outlet check valve is connected on the liquid outlet, the liquid inlet switch handle for controlling the opening and closing is rotatably arranged on the liquid inlet check valve, the liquid outlet switch handle for controlling the opening and closing is rotatably arranged on the liquid outlet check valve, and the driving piece connects the liquid inlet switch handle and the liquid outlet switch handle through the connecting rod assembly. When the driving piece controls the friction ring to contact the brake ring, the connecting rod assembly drives the liquid inlet switch handle to close, and the connecting rod assembly drives the liquid outlet switch handle to close. When the driving piece controls the friction ring to move away from the brake ring, the connecting rod assembly drives the liquid inlet switch handle to open, and the connecting rod assembly drives the liquid outlet switch handle to open. Two ends of the friction ring are symmetrically provided with lugs, the cover is provided with a through slot for the lugs to pass through and extend out, one side of the through slot is an opening not closed for mounting the lugs, the connecting rod assembly comprises a driving plate and first connecting plates symmetrically arranged at two ends of the driving plate, the driving piece is connected with the driving plate, and one first connecting plate corresponds to one lug. The liquid inlet and the liquid outlet of the conveying pipe extend from the same side of the shell of the peristaltic pump, the connecting rod assembly further comprises a second connecting plate, one end of the second connecting plate is connected with the driving plate, the other end is provided with two supporting rods on two sides, the supporting rods are provided with long strip-shaped grooves, and the liquid inlet switch handle and the liquid outlet switch handle are movably connected with one long strip-shaped groove through a rotating shaft respectively.

2. The flow calculation control structure of claim 1, wherein, One side surface of the base shell is an arc surface, the driving plate is an arc plate, and the driving plate is slidably attached to the surface of the base shell.

3. The flow calculation control structure of claim 2, wherein, The base shell is provided with a first sliding sleeve, the first connecting plate penetrates through the first sliding sleeve and forms a sliding connection, the shell is provided with a second sliding sleeve, and the second connecting plate penetrates through the second sliding sleeve and forms a sliding connection.

4. The flow calculation control structure of claim 3, wherein, The end of the first connecting plate is provided with a clamping column, the connecting rod assembly further comprises a screw rod, a nut, a rotating ring and a rotating cover; The screw rod head of the screw rod is provided with a connecting hole for clamping with the clamping column, the nut is threadedly connected with the screw rod; the lug is provided with an open slot, a transition protrusion is arranged on the periphery of the open slot, the rotating ring is rotationally connected with the transition protrusion, and the rotation axis is consistent with the axial center line of the screw rod, the rotating ring is a non-closed ring with a broken section, the rotating cover is fixedly connected with the rotating ring, the screw rod penetrates through the open slot and the rotating cover, and the rotating cover wraps the nut to drive the nut to rotate.

5. The flow calculation control structure of claim 4, wherein, The rotating ring is provided with a fixing column, and the rotating cover is provided with a fixing hole matched with the fixing column.

6. The flow calculation control structure of claim 3, wherein, The end of the first connecting plate is provided with a clamping column, the connecting rod assembly further comprises a screw rod, a nut and a spring; The screw rod head of the screw rod is provided with a connecting hole for clamping with the clamping column, the spring is sleeved on the screw rod, the screw rod penetrates through the lug, the nut is threadedly connected with the screw rod, and the nut and the spring are located on the two sides of the lug respectively.

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