Roller adjustment structure for peristaltic pump

Abstract

The roller adjusting structure of the peristaltic pump comprises a rotating frame, a roller, a shell, and an adjusting assembly. The shell is connected to the outside of the rotating frame. A conveying pipe is pressed between the wheel surface of the roller and the inner wall surface of the shell. The rotating frame comprises a fixed frame and a movable frame. The movable frame is slidingly arranged on the circumferential side of the fixed frame. The roller is rotatably arranged on the inner side of the movable frame. The axes of multiple rollers are located on the same structural circle. The sliding direction of the movable frame is along the diameter direction of the structural circle. The adjusting assembly is arranged on the shell and connected with the movable frame. The peristaltic pump with adjustable pipe pressing gap can adjust the position between the fixed frame and the movable frame through the adjusting assembly after assembly, so as to adjust the pressing amount of the roller on the conveying pipe. The assembly is facilitated, and the pressure between the roller and the conveying pipe can be adjusted according to the fluid output, so as to achieve the purpose of precise control of the flow.

Description

[0001] The application is a divisional application, the original application's application number is: "202111640640.5", the application date is: "December 29, 2021", and the invention name is: "Flow precise control peristaltic pump". TECHNICAL FIELD

[0002] The application relates to the field of peristaltic pumps, in particular to a roller adjusting structure of a peristaltic pump. BACKGROUND

[0003] The peristaltic pump extrudes a soft tube filled with fluid through rollers, and the fluid in the tube moves forward as the rollers slide forward. The fluid is pumped by the alternating extrusion and release of the soft tube by multiple rollers. In the prior art, the rollers and the soft tube need a certain pressure between them, which makes it difficult to assemble them, and the pressure after assembly is fixed and cannot be adjusted. The poor fit between components also causes the flow to be unable to be precisely controlled.

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

[0005] The application provides a roller adjusting structure of a peristaltic pump to solve the problems of the existing technology that the rotating frame is difficult to assemble and the flow cannot be precisely controlled.

[0006] To solve the above technical problems, the technical scheme of the application is: a roller adjusting structure of a peristaltic pump, comprising a rotating frame, rollers, a housing, and an adjusting assembly, the housing is connected to the outside of the rotating frame, a conveying pipe is arranged between the wheel surface of the roller and the inner wall surface of the housing, the rotating frame is rotated to make the roller roll and extrude along the conveying pipe, thereby driving the liquid in the conveying pipe to flow.

[0007] The rotating frame comprises a fixed frame and a movable frame, the movable frame is slidingly arranged on the periphery of the fixed frame, the rollers are rotationally arranged on the inner side of the movable frame, the axes of the multiple 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 housing, the adjusting assembly is connected with the movable frame, and is used for driving the movable frame to slide, so as to adjust the distance between the rollers.

[0008] In the application, the fixed frame comprises a fixed cylinder and parallelly arranged bottom plate and top plate, the fixed cylinder is arranged between the bottom plate and the top plate, the bottom plate and the top plate are both provided with a sliding groove for limiting the sliding of the movable frame, and the movable frame is provided with a sliding block matched with the sliding groove;

[0009] The adjusting assembly comprises a screw rod, a connecting rod and a connecting piece; the connecting piece is located inside the fixed frame, the connecting piece is movably connected with the corresponding movable frame through the connecting rod on the periphery, the screw rod is threadedly connected with the shell, and the screw rod is movably connected with the connecting piece on the side away from the connecting rod.

[0010] The fixed frame is provided with a mounting hole penetrating through the top plate and the fixed cylinder, 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 bottom wall of the mounting hole and the connecting piece, the spring is located on the side of the connecting piece opposite to the screw rod, and the spring is always in a compressed state during the sliding stroke of the movable frame.

[0011] Further, the end of the screw rod 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, the two sides of the end of the connecting rod away from the movable frame are provided with rotating columns, the first locking piece and the second locking piece clamp the rotating columns, so that the rotating columns are movably connected with the connecting piece.

[0012] Further, the connecting piece is a square structure, or one side of the connecting piece is provided with a positioning convex part, and the inner wall of the mounting hole is provided with a positioning groove corresponding to the positioning convex part, so that the connecting piece and the connecting rod are assembled in the normal direction.

[0013] In addition, the adjusting assembly further comprises a rotating piece movably connected with the shell, the screw rod is threadedly connected with the rotating piece, the rotating piece comprises a clamping position and a rotating position on the movable track of the shell, and the clamping position is closer to the connecting piece than the rotating position.

[0014] When the rotating piece is located at the rotating position, the rotating piece is rotatable relative to the shell, the rotation axis of the rotating piece is coaxial with the axial center line of the screw rod, so that the screw rod and the rotating piece have a locking effect.

[0015] When the rotating piece is located at the clamping position, the rotating piece is not rotatable relative to the shell, so that the screw rod and the rotating piece can rotate relative to each other.

[0016] In the present application, the shell is provided with a containing groove for mounting the rotating piece, the periphery of the rotating piece is provided with a clamping tooth, the inner wall of the containing groove is provided with a clamping groove corresponding to the clamping tooth, the clamping tooth and the clamping groove are connected when the rotating piece is located at the clamping position, and the clamping tooth and the clamping groove are out of position when the rotating piece is located at the rotating position.

[0017] In the present application, the rotating member comprises a pressing portion extending outwardly from the housing, the pressing portion being used to be pressed to make the rotating member slide to the clamping position.

[0018] Further, the rotating member is provided with pressing portions on opposite sides, the pressing portions being provided with blocking members at one end away from the rotating member, the first end of the blocking member being located on the side of the pressing portion away from the housing, the second end of the blocking member being located on the side of the pressing portion close to the housing, a torsion spring being provided on the rotating shaft between the blocking member and the pressing portion, the blocking member comprising a locking position and an unlocking position on the rotating track;

[0019] When the blocking member is located at the locking position, the second end of the blocking member is limited between the pressing portion and the housing, thereby limiting the rotating member from sliding to the clamping position, and the torsion spring drives the rotating member to remain at the locking position.

[0020] When the blocking member is located at the unlocking position, the first ends of the two blocking members on the two pressing portions are close to each other, so that the second end of the blocking member rotates outwardly, thereby enabling the pressing portion to be close to the housing, and the rotating member can slide to the clamping position.

[0021] Further, the first end of the blocking member is in an arc shape, the side of the first end of the blocking member close to the screw member being a concave side, and the pressing portion is provided with an avoidance hole for avoiding the first end of the blocking member.

[0022] Compared with the prior art, the present application has the following beneficial effects: the roller adjusting structure of the peristaltic pump can adjust the position between the fixed frame and the movable frame through the adjusting assembly, so as to adjust the extrusion amount of the roller on the conveying pipe, which facilitates assembly and enables the pressure between the roller and the conveying pipe to be adjusted according to the fluid output, thereby achieving the purpose of precise control of flow. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings needed in the embodiments, and the drawings in the following description are only corresponding to some embodiments of the present application.

[0024] Figure 1 FIG. 1 is a structural schematic view of a first embodiment of the present application, which is a flow precise control peristaltic pump.

[0025] Figure 2 FIG. 2 is a partial structural enlarged view of A in FIG. 1. Figure 1

[0026] Figure 3 FIG. 3 is a structural schematic view of a rotating frame and a roller in the first embodiment.​

[0027] Figure 4 A sectional view of the rotating frame and the roller for adjusting the assembly in the first embodiment.

[0028] Figure 5 A sectional view of the rotating frame and the roller for adjusting the assembly in the first embodiment. Figure 4 An enlarged view of the partial structure at B in the figure.

[0029] Figure 6 A sectional view of the rotating frame and the roller for adjusting the assembly in the first embodiment. Figure 5 Another schematic view of the structure.

[0030] Figure 7 A schematic view of the structure of the second embodiment of the flow precision control peristaltic pump of the present application.

[0031] Figure 8 A schematic view of the structure of the magnetic ring, the brake ring and the friction ring in the second embodiment.

[0032] Figure 9 A schematic view of the cooperation of the magnetic ring and the Hall assembly in the second embodiment.

[0033] Figure 10 A sectional view of the rotating frame and the roller for adjusting the assembly in the first embodiment. Figure 7 An enlarged view of the partial structure at C in the figure.

[0034] Figure 11 A schematic view of the structure of the lug, the rotating ring and the rotating cover in the second embodiment.

[0035] Figure 12 A schematic view of the connection structure of the second connecting plate and the liquid inlet switch handle and the liquid outlet switch handle in the second embodiment. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only the orientation of the drawings, and the directional terms are used to illustrate and understand the present application, but not to limit the present application.

[0038] The terms "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance, and are not limited as the order of sequence.

[0039] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, 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 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.

[0040] 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 the hose, 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 extrusion of the hose. The looser the hose, the smaller the pressure, and the longer the service life of the hose. However, the conveying effect may not meet the requirements. On the contrary, the tighter the hose, the greater the pressure, and when the tightness reaches a certain degree, it will cause relatively large hose 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 fit between the components will also result in inaccurate flow control.

[0041] 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 that affect the accuracy of the flow.

[0042] The following is a first embodiment of a flow accurate control peristaltic pump provided by the present application to solve the above technical problems.

[0043] 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.

[0044] In the drawings, similar structures are denoted by the same reference numerals.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 circumferentially through the connecting piece 19 and the connecting rod 18, so that the extrusion amount of the conveying pipe 14 can be increased.

[0054] It is conceived that, since the rotating frame 16 rotates relative to the shell 121 during work, 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 plane bearing 1A in the embodiment.

[0055] In the embodiment, the fixed frame 161 is provided with a mounting hole 1614, and the adjusting assembly further comprises 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 of the connecting piece 19 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 plane bearing 1A can automatically keep in contact with the connecting piece 19.

[0056] Further, the fixed frame 161 comprises 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.

[0057] 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.

[0058] In the embodiment, the connecting piece 19 comprises 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.

[0059] 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, first, the spring 1B is 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.

[0060] 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.

[0061] 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, the screw rod 14 is threadedly connected to the rotating piece 15, and 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.

[0062] 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, and 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.

[0063] 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.

[0064] 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 rotating piece 15 to press downward 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.

[0065] 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.

[0066] 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.

[0067] The opposite sides of the rotating piece 15 are provided with the pressing parts 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, the torsional 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.

[0068] As 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 torsional 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 rotate to a more inclined direction.

[0069] 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.

[0070] As 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 end of the blocking piece 152 rotates 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.

[0071] The first end of the blocking piece 152 in the embodiment is arc-shaped, the first end of the blocking piece 152 is close to the inner concave side of the screw piece 14, the pressing part 151 is provided with a clearance hole 153 for avoiding the first 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.

[0072] When the flow precision control peristaltic pump in the embodiment is assembled and used, 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.

[0073] 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, 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.

[0074] 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.

[0075] 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.

[0076] A flow precision control peristaltic pump comprises a rotating frame, a motor 21, a roller, a shell 23 and a conveying pipe 26.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 control of the liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 is closed to prevent backflow of the fluid and improve the accuracy of the flow control. The same driving member 24 is used to drive two structures, which is low in cost, high in efficiency, and good in synchronism.

[0086] In the embodiment, please refer to Figure 7 and Figure 10 . The two ends of the friction ring 29 are symmetrically provided with lugs 291 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 which is not closed to facilitate installation of the lugs, and the open end of the through slot is shielded by the base shell 221.

[0087] Please refer to Figure 7 , the connecting rod assembly includes a driving plate 251 and first connecting plates 252 symmetrically arranged at the two ends of the driving plate 251, the driving member 24 is connected with the driving plate 251, and one first connecting plate 252 corresponds to one lug 291. The driving member 24 can be a linear driving device such as an existing electric push rod or an electric cylinder.

[0088] 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 driving 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, and the supporting rods are provided with long slots 2531, the liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 are respectively connected with one long slot 2531 through a rotating shaft 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.

[0089] The surface of one side of the base shell 221 is arc-shaped, and the driving plate 251 is an arc-shaped plate which is slidably flat on the surface of the base shell 221, and the sliding is stable.

[0090] 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, which provides stability for driving sliding.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] The adjusting assembly includes a screw rod, a connecting rod, and a connecting piece.

[0100] 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.

[0101] 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.

[0102] The fixed frame comprises a fixed cylinder and parallelly 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.

[0103] 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.

[0104] 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.

[0105] The working principle of the flow precise 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.

[0106] 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.

[0107] The flow precise 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.

[0108] 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.

[0109] 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 subject to the scope defined by the claims.

Claims

1. A roller adjustment structure of a peristaltic pump, characterized by, The application relates to a liquid conveying device, which comprises a rotating frame, a roller, a shell and an adjusting assembly, the shell is connected to the outside of the rotating frame, a conveying pipe is arranged between the wheel surface of the roller and the inner wall surface of the shell, the rotating frame rotates to drive the roller to roll and extrude along the conveying pipe, and then to drive the liquid in the conveying pipe to flow. The rotating frame comprises a fixed frame and a movable frame, the movable frame is slidably arranged on the periphery of the fixed frame, the roller is rotatably arranged on the inner side of the movable frame, the axes of the plurality of rollers are located on a same structural circle, the sliding direction of the movable frame is along the diameter direction of the structural circle, the adjusting assembly is arranged on the shell, the adjusting assembly is connected with the movable frame, and the adjusting assembly is used for driving the movable frame to slide so as to adjust the distance between the rollers. 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, the bottom plate and the top plate are both provided with sliding grooves for limiting the sliding of the movable frame, and the movable frame is provided with sliding blocks matched with the sliding grooves. The adjusting assembly comprises a screw rod, a connecting rod and a connecting piece, the connecting piece is located in the interior of the fixed frame, the periphery of the connecting piece is movably connected with the corresponding movable frame through the connecting rod, the screw rod is threadedly connected with the shell, and the screw rod is rotatably connected with the side of the connecting piece far away from the connecting rod. The fixed frame is provided with a mounting hole penetrating through the top plate and the fixed cylinder, 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 bottom wall of the mounting hole and the connecting piece, the spring is located on the side of the connecting piece opposite to the screw rod, and the spring is always in a compressed state in the sliding stroke of the movable frame. The adjusting assembly further comprises a rotating piece movably connected with the shell, the screw rod is threadedly connected with the rotating piece, the rotating piece comprises a clamping position and a rotating position on the movable track of the shell, and the clamping position is closer to the connecting piece than the rotating position. When the rotating piece is located at the rotating position, the rotating piece is rotatable relative to the shell, the rotating axis of the rotating piece is coaxial with the axial center line of the screw rod, so that the screw rod and the rotating piece have an anti-loosening effect. When the rotating piece is located at the clamping position, the rotating piece is not rotatable relative to the shell, so that the screw rod and the rotating piece can relatively rotate.

2. The roller adjustment structure of a peristaltic pump according to claim 1, wherein The end of the screw rod 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, the two sides of the end of the connecting rod far away from the movable frame are provided with rotating columns, and the first locking piece and the second locking piece clamp the rotating columns, so that the rotating columns are rotatably connected with the connecting piece.

3. The roller adjustment structure of a peristaltic pump according to claim 2, characterized by, The connecting piece is in a square structure, or one side of the connecting piece is provided with a positioning convex part, the inner wall of the mounting hole is provided with a positioning groove matched with the positioning convex part, so that the connecting piece and the connecting rod are forwardly assembled. The connecting piece is in a square structure, or one side of the connecting piece is provided with a positioning convex part, the inner wall of the mounting hole is provided with a positioning groove matched with the positioning convex part, so that the connecting piece and the connecting rod are forwardly assembled.

4. The roller adjustment structure of a peristaltic pump according to claim 1, wherein The shell is provided with a containing groove for mounting the rotating member, the rotating member is provided with a clamping tooth on the circumferential side, the inner wall of the containing groove is provided with a clamping groove corresponding to the clamping tooth, the clamping tooth and the clamping groove are connected when the rotating member is in the clamping position, and the clamping tooth and the clamping groove are out of position when the rotating member is in the rotating position.

5. The roller adjustment structure of a peristaltic pump according to claim 1, wherein The rotating member comprises a pressing part, the pressing part extends outwardly from the shell, and the pressing part is used for being pressed to make the rotating member slide to the clamping position.

6. The roller adjustment structure of a peristaltic pump according to claim 5, wherein The opposite sides of the rotating member are provided with pressing parts, the blocking pieces are rotationally arranged at the ends of the pressing parts away from the rotating member, the first end of the blocking piece is located on the side of the pressing part away from the shell, the second end of the blocking piece is located on the side of the pressing part close to the shell, a torsional spring is arranged on the rotation axis between the blocking piece and the pressing part, and the blocking piece comprises a locking position and an unlocking position on the rotation track. When the blocking piece is in the locking position, the second end of the blocking piece is limited between the pressing part and the shell, so that the rotating member is limited to slide to the clamping position, and the torsional spring drives the rotating member to remain in the locking position. When the blocking piece is in the unlocking position, the first ends of the two blocking pieces on the two pressing parts are close to each other, so that the second end of the blocking piece rotates outwardly, and then the pressing part can be close to the shell, and the rotating member can slide to the clamping position.

7. The roller adjustment structure of a peristaltic pump according to claim 6, wherein The first end of the blocking piece is in an arc structure, the side of the first end of the blocking piece close to the screw member is a concave side, and the pressing part is provided with an avoidance hole for avoiding the first end of the blocking piece.

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