CN115681104A - Roller adjusting structure of peristaltic pump - Google Patents

Abstract

This division application provides a structure is adjusted to running roller of peristaltic pump, it includes the rotating turret, the running roller, a housing, adjusting part, the outside at the rotating turret is connected to the casing, the conveyer pipe extrusion sets up between the internal face of the wheel face of running roller and casing, the rotating turret includes mount and adjustable shelf, the adjustable shelf slides and sets up in the week side of mount, the running roller rotates the inboard that sets up at the adjustable shelf, the axis of a plurality of running rollers is located same structure circle, the sliding direction of adjustable shelf is along the diametral direction of structure circle, adjusting part sets up on the casing and is connected with the adjustable shelf. After the peristaltic pump with the adjustable pressure pipe gap 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, the assembly is convenient, and meanwhile, the pressure between the roller and the conveying pipe can be adjusted according to the fluid output condition, and the aim of accurately controlling the flow is fulfilled.

Description

Roller adjusting structure of peristaltic pump

The application is a divisional application, and the application number of the original application is as follows: "202111640640.5", application date is: the invention name of 12 months and 29 days in 2021 is: the peristaltic pump is controlled accurately in flow.

Technical Field

The invention relates to the field of peristaltic pumps, in particular to a roller adjusting structure of a peristaltic pump.

Background

The peristaltic pump extrudes a hose filled with fluid through the rollers, and pumps the fluid through the plurality of rollers to alternately extrude and release the hose as the fluid in the hose moves forward along with the rollers sliding forward. Wherein in prior art, also because need certain pressure between running roller and the hose, lead to the difficult assembly between the two, and the compressing tightly relation after the assembly is fixed promptly unadjustable, and the cooperation between the part is not good also can lead to the flow can not by accurate control.

Therefore, it is necessary to provide a roller adjustment structure of a peristaltic pump to solve the above technical problems.

Disclosure of Invention

The invention provides a roller adjusting structure of a peristaltic pump, which aims to solve the problems that a rotating frame in the prior art is difficult to assemble and the flow cannot be accurately controlled.

In order to solve the technical problems, the technical scheme of the invention is as follows: a roller adjusting structure of a peristaltic pump comprises a rotating frame, rollers, a shell and an adjusting assembly, wherein the shell is connected to the outside of the rotating frame, a conveying pipe is arranged between the surface of each roller and the inner wall surface of the shell, and the rotating frame rotates to enable the rollers to roll and extrude along the conveying pipe so as to drive liquid in the conveying pipe to flow;

the rolling stand includes mount and adjustable shelf, the adjustable shelf slides and sets up week side of mount, the running roller rotates and sets up the inboard of adjustable shelf, and is a plurality of the axis of running roller is located same structure circle, the slip direction of adjustable shelf is along the diametral of structure circle, adjusting part sets up on the casing, adjusting part with the adjustable shelf is connected, is used for the drive the adjustable shelf slides, thereby adjusts distance between the running roller.

In the invention, the fixed frame comprises a fixed cylinder, a bottom plate and a top plate which are arranged in parallel, the fixed cylinder is arranged between the bottom plate and the top plate, sliding grooves used for limiting the sliding of the movable frame are arranged on the bottom plate and the top plate, and a sliding block matched with the sliding grooves is arranged on the movable frame;

the adjusting assembly comprises a screw rod piece, a connecting rod and a connecting piece; the connecting piece is located the inside of mount, all sides of connecting piece are passed through the connecting rod with correspond the adjustable shelf swing joint, the screw member with casing threaded connection, just the screw member with the connecting piece is kept away from the one side of connecting rod is rotated and is connected.

The adjusting assembly comprises a fixing frame, a top plate, a fixing barrel and a spring, wherein a mounting hole is formed in the fixing frame, the mounting hole penetrates through the top plate and the fixing barrel, the adjusting assembly further comprises the spring, the spring and the connecting piece are located in the mounting hole, the spring is connected to the bottom wall of the mounting hole and between the connecting pieces, the spring is located on the other side opposite to the screw rod piece, the movable frame is arranged in a sliding stroke, and the spring is always in a compression state.

Further, the screw rod spare is close to the one end of connecting piece is connected with flat bearing, flat bearing with the connecting piece contact, the connecting piece includes first retaining member and second retaining member, the connecting rod is kept away from the both sides of the one end of adjustable shelf are provided with the rotary column, first retaining member and second retaining member centre gripping the rotary column, so that the rotary column with the connecting piece rotates to be connected.

Further, the connecting piece is of 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 is assembled with the connecting rod in the forward direction.

In addition, the adjusting assembly further comprises a rotating part, the rotating part is movably connected to the shell, the screw rod part is in threaded connection with the rotating part, the rotating part comprises a clamping position and a rotating position on a moving track of the shell, and the clamping position is closer to the connecting part relative to the rotating position;

when the rotating piece is located at the rotating position, the rotating piece can rotate relative to the shell, and the rotating axis of the rotating piece is coaxial with the axial center line of the screw rod piece, so that the screw rod piece 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 rotate relatively.

In the invention, the shell is provided with a containing groove for installing the rotating part, the periphery of the rotating part is provided with clamping teeth, the inner wall of the containing groove is provided with a clamping groove corresponding to the clamping teeth, when the rotating part is positioned at the clamping position, the clamping teeth are connected with the clamping groove, and when the rotating part is positioned at the rotating position, the clamping teeth and the clamping groove are staggered.

In the invention, the rotating part comprises a pressing part which extends and protrudes outside the shell, and the pressing part is used for pressing to enable the rotating part to slide to the clamping position.

Furthermore, pressing parts are arranged on two opposite sides of the rotating part, one end, far away from the rotating part, of the pressing part is rotatably provided with a blocking part, the first end of the blocking part is located on one surface, far away from the shell, of the pressing part, the second end of the blocking part is located on one surface, close to the shell, of the pressing part, a torsion spring is arranged on a rotating shaft between the blocking part and the pressing part, and the blocking part comprises a locking position and an unlocking position on a rotating track;

when the blocking piece is located at the locking position, the second end of the blocking piece is limited between the pressing part and the shell, so that the rotating part is limited from sliding to the clamping position, and the torsion spring drives the rotating part to be kept at the locking position;

when the blocking piece is located at 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 towards the periphery, the pressing parts can approach the shell, and the rotating part can slide towards the clamping position.

Furthermore, the first end of blocking piece is the arc structure, the first end of blocking piece is close to one side of screw member is the indent side, it is right to be provided with on the splenium to be used for keeping away the position hole that keeps away that the first end of blocking piece keeps away the position.

Compared with the prior art, the invention has the beneficial effects that: 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 that the extrusion amount of the roller to the conveying pipe can be adjusted, the assembly is convenient, and meanwhile, the pressure between the roller and the conveying pipe can be adjusted according to the fluid output condition, and the aim of accurately controlling the flow is fulfilled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.

Fig. 1 is a schematic structural diagram of a first embodiment of a peristaltic pump with precise flow control according to the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is a schematic structural view of the turret and the roller in the first embodiment.

Fig. 4 is a sectional view of the turret and rollers to adjust the assembly in the first embodiment.

Fig. 5 is an enlarged view of a portion B of fig. 4.

Fig. 6 is another state diagram of the structure of fig. 5.

Fig. 7 is a schematic structural diagram of a peristaltic pump with precise flow control according to a second embodiment of the present invention.

Fig. 8 is a schematic structural view of a magnetic ring, a brake ring and a friction ring in the second embodiment.

Fig. 9 is a schematic diagram of the magnetic ring and the hall element in the second embodiment.

Fig. 10 is an enlarged view of a portion of the structure at C in fig. 7.

FIG. 11 is a schematic view of the structure of the lugs, the rotating ring and the rotating cover in the second embodiment.

Fig. 12 is a schematic view of a connection structure between the second connection plate and the liquid inlet switch handle and the liquid outlet switch handle in the second embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", "top" and "bottom", refer to the orientation of the drawings, and are used for illustration and understanding, but not for limiting the present invention.

The terms "first," "second," and the like in the terms of the invention are used for descriptive purposes only and not for purposes of indication or implication relative importance, nor as a limitation on the order of precedence.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., the connection may be a detachable connection or a connection in a unitary structure; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The peristaltic pump is a device for conveying liquid by extruding a hose by rollers, the fluid filled hose is extruded by the rollers, the fluid in the hose moves forwards along with the forward sliding of the rollers, the hose is pumped by alternately extruding and releasing the plurality of rollers, and in order to prevent the backflow of the fluid, the pressure on the hose must be kept through the rollers all the time to obtain the tightness. And the size of pressure depends on the elasticity degree that the running roller oppressed the hose, presses the pipe looser, and pressure is less, and the hose life-span is longer, but carries the effect and probably can not reach the requirement, and on the contrary, presses the pipe tighter, and pressure is bigger, will produce the pipe fatigue wearing and tearing of pressure than great to the hose when tightly reaching certain degree, and the hose life-span will also be short. In the prior art, the roller and the hose are difficult to assemble due to the fact that certain pressure is needed between the roller and the hose, the pressing relation after assembly is fixed and cannot be adjusted, and the flow cannot be controlled accurately due to the fact that the parts are not matched well.

On the other hand, many peristaltic pumps need to detect and control the flow rate, and the precision of the prior art peristaltic pump for controlling the flow rate is not very high. The pressure between the roller and the hose is not ideal due to the deviation in manufacturing, assembling and the like, which is also some factor causing low flow precision.

The following is a first embodiment of a peristaltic pump with precise flow control according to the present invention, which solves the above technical problems.

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural view of a peristaltic pump with precise flow rate control according to a first embodiment of the present invention, fig. 2 is an enlarged view of a portion of a structure at a in fig. 1, and fig. 3 is a schematic structural view of a rotating frame and rollers in the first embodiment.

In the drawings, elements having similar structures are denoted by the same reference numerals.

The invention provides a peristaltic pump capable of accurately controlling flow, which comprises a rotating frame 16, a motor 11, rollers 17, a shell 121 and a conveying pipe 14.

The motor 11 is connected with the rotating frame 16 to drive the rotating frame to rotate, it can be understood that the motor 11 and the rotating frame 16 can be in transmission connection through a gear system, and the gear transmission mode is the mature prior art and is not described herein.

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

The conveying pipe 14 is arranged around the periphery of the rotating frame 16 and is arranged between the wheel surface of the roller 17 and the inner wall surface of the shell 121 in an extruding mode, and the rotating frame 16 rotates to enable the roller 17 to be extruded in a rolling mode along the conveying pipe 14, so that liquid in the conveying pipe 14 is driven to flow.

Wherein, 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.

The adjustable shelf 162 slides and sets up the week side of mount 161, running roller 17 rotates and sets up the inboard of adjustable shelf 162, and is a plurality of the axis of running roller 17 is located same structure circle, the sliding direction of adjustable shelf 162 is along the diametric (al) of structure circle, adjusting part sets up on the casing 121, adjusting part with the adjustable shelf 162 is connected, is used for the drive the adjustable shelf 162 slides, thereby adjusts the distance between the running roller 17, be equivalent to adjusting structure circle diameter size promptly, construct the circle diameter and be big more, then running roller 17 is more violent to the extrusion of conveyer pipe 14.

Before the assembly, the diameter of the structure circle of the running roller 17 is turned down, so that the assembly is easier, the diameter of the structure circle of the running roller 17 is adjusted according to the use effect and the requirement after the assembly, the pressure of the running roller 17 on the conveying pipe 14 is moderate, the service life of the conveying pipe is longer, the conveying precision is higher, the good extrusion conveying efficiency is higher, and the conveying requirement can be met.

Referring to fig. 3 and 4, in the present invention, the adjusting assembly includes a screw member 14, a connecting rod 18, and a connecting member 19.

The connecting piece 19 is located inside the fixed frame 161, the peripheral sides of the connecting piece 19 are movably connected with the corresponding movable frames 162 through the connecting rods 18, the screw rod piece 14 is in threaded connection with the shell 121, and one surfaces, far away from the connecting rods 18, of the screw rod piece 14 and the connecting piece 19 are rotatably connected, namely in fig. 4, the connecting rods 18 are in a sagging state relative to the connecting piece 19, the screw rod piece 14 is connected with the top surface of the connecting piece 19, and when the screw rod piece 14 rotates and moves downwards, the movable frames 162 can be extruded and expanded towards the outer periphery through the connecting pieces 19 and the connecting rods 18, so that the extrusion amount of the conveying pipe 14 can be improved.

It is contemplated that the screw member 14 may be coupled to the coupling member 19 via a bearing, such as the screw member 14 coupled to the coupling member 19 via the flat bearing 1A in this embodiment, since the turret 16 rotates relative to the housing 121 during operation.

Wherein, the fixed mount 161 is provided with a mounting hole 1614, the adjusting assembly further comprises a spring 1B, the spring 1B and the connecting piece 19 are both 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 other side opposite to the screw rod piece 14, the movable mount 162 is in a sliding stroke, the spring 1B is always in a compression state, and the planar bearing 1A can automatically keep in contact with the connecting piece 19.

Further, the fixing frame 161 includes a fixing cylinder 1612, and a bottom plate 1613 and a top plate 1611 arranged in parallel, the fixing cylinder 1612 is arranged between the bottom plate 1613 and the top plate 1611, and the mounting hole 1614 penetrates the top plate 1611 and the fixing cylinder 1612.

Both the bottom plate 1613 and the top plate 1611 are provided with sliding grooves 1615 for limiting the sliding of the movable frame 162, and the movable frame 162 is provided with sliding blocks adapted to the sliding grooves 1615, so as to ensure the stable movement of the movable frame 162. As shown in fig. 3, a through slot is formed in a side wall of the fixing cylinder 1612, and the connecting rod 18 can extend into the mounting hole 1614 through the through slot.

In this embodiment, the connecting member 19 includes a first locking member 191 and a second locking member 192, the two sides of the end of the connecting rod 18 away from the movable frame 162 are provided with the rotating column 181, and the first locking member 191 and the second locking member 192 clamp the rotating column 181, so that the rotating column 181 is rotatably connected with the connecting member 19, it can be understood that the first locking member 191 and the second locking member 192 are each provided with a groove adapted to the rotating column 181.

In this embodiment, mounting hole 1614 is a square hole, and connecting member 19 is a square structure, so that first locking member 191 and second locking member 192 can slide along mounting hole 1614 in a directional manner, and the directional sliding facilitates the forward docking of the rotating column with connecting member 19. During installation, spring 1B is installed in installation hole 1614, first locking member 191 is installed in installation hole 1614, connecting rod 18 extends into installation hole 1614, second locking member 192 is installed in installation hole 1614, first locking member 191 and second locking member 192 can be locked through screw connection, and rotating column 181 is locked between first locking member 191 and second locking member 192.

It is easy to think that the mounting hole 1614 may also be designed as a circular hole, and at the same time, a positioning sliding slot is provided on the hole wall, and a positioning convex portion corresponding to the positioning sliding slot is provided on one side of the connecting member 19, so that the connecting member 19 and the connecting rod 18 are positively assembled.

Referring to fig. 2, 5 and 6, in the present invention, the adjusting assembly further includes a rotating member 15, the rotating member 15 is movably connected to the housing 121, the screw member 14 is in threaded connection with the rotating member 15, the rotating member 15 includes a locking position and a rotating position on the moving track of the housing 121, and the locking position is closer to the connecting member 19 than the rotating position, that is, the rotating member 15 can slide downward to the locking position as shown in fig. 5.

When the rotating member 15 is located at the rotating position, the rotating member 15 can rotate relative to the housing 121, and the rotating axis of the rotating member 15 is coaxial with the axial center line of the screw member 14, so that the screw member 14 and the rotating member 15 have a locking effect, and meanwhile, due to the existence of the spring 1B, the rotating member 15 can be elastically pressed to be kept at the rotating position, and at the moment, the rotating screw member 14 can idle.

It is easy to think that balls, lubricating oil and the like can be arranged between the rotating member 15 and the inner wall of the receiving groove 1211, so that the rotating member can run idle more smoothly, and the anti-loosening effect of the screw member is improved.

When the rotating member 15 is located at the locking position, the rotating member 15 is not rotatable relative to the housing 121, so that the relative rotation between the screw member 14 and the rotating member 15 is possible. The rotating part 15 is controlled to be pressed down for a certain distance by applying external force, so that the rotating part 15 moves to the clamping fixing position, the screw rod part 14 can be rotated at the moment, the extrusion amount of the connecting part 19 by the screw rod part 14 is adjusted, and the extrusion amount of the conveying pipe 14 by the roller 17 is adjusted.

Referring to fig. 5, in the embodiment, the housing 121 is provided with an accommodating groove 1211 for installing the rotating member 15, the circumferential side of the rotating member 15 is provided with the latch 154, an inner wall of the accommodating groove 1211 is provided with a slot 1212 corresponding to the latch 154, when the rotating member 15 is located at the latching position, the latch 154 is connected to the slot 1212, and when the rotating member 15 is located at the rotating position, the latch 154 is dislocated from the slot 1212.

In this embodiment, the rotating member 15 includes a pressing portion 151, the pressing portion 151 extends and protrudes outside the housing 121, and the pressing portion 151 is used for pressing to make the rotating member 15 slide to the card retention position, which is convenient for operation.

The two opposite sides of the rotating member 15 are each provided with a pressing portion 151, one end of the pressing portion 151 away from the rotating member 15 is provided with a blocking member 152 in a rotating manner, a first end of the blocking member 152 is located on one surface of the pressing portion 151 away from the housing 121, a second end of the blocking member 152 is located on one surface of the pressing portion 151 close to the housing 121, a torsion spring 155 is arranged on a rotating shaft between the blocking member 152 and the pressing portion 151, and the blocking member 152 includes a locking position and an unlocking position on a rotating track.

As shown in fig. 5, when the blocking member 152 is located at the locking position, the second end of the blocking member 152 is restricted between the pressing portion 151 and the housing 121, thereby restricting the rotating member 15 from sliding to the catching position, and the torsion spring 155 drives the rotating member 15 to be held at the locking position, wherein it can be understood that the blocking member 152 is rotatably disposed in the mounting groove at one end of the pressing portion 151, when the blocking member 152 is located at the locking position, the blocking member 152 is in an inclined state with respect to the surface of the housing 121, and the blocking member 152 contacts with the inner wall of the mounting groove, so that the blocking member 152 cannot rotate in a more inclined direction.

When the blocking member 152 is located at the locking position, the upper surface of the rotating member 15 contacts the inner top surface of the receiving groove 1211, so that a certain external force is applied to press the pressing portion 151 to deform, and the blocking member 152 can be rotationally unlocked outwards, thereby ensuring that the blocking member 152 can be stably located at the locking position.

As shown in fig. 6, when the blocking member 152 is located at the unlocking position, the first ends of the two blocking members 152 of the two pressing portions 151 approach each other, so that the second ends of the blocking members 152 rotate toward the outer circumference, and further, the pressing portions 151 can approach the housing 121, and the rotating member 15 can slide toward the locking position.

The first end of the blocking member 152 in this embodiment is of an arc-shaped structure, one side of the first end of the blocking member 152, which is close to the screw member 14, is an inward concave side, and the pressing portion 151 is provided with a position avoiding hole 153 for avoiding the first end of the blocking member 152, so that when the blocking member 152 slides to the unlocking position, the bottom end of the blocking member 152 can be furthest away from the housing 121, and the space utilization rate is higher.

When the peristaltic pump with accurate flow control in this embodiment is assembled and used, the rollers 17, the fixed frame 161, the movable frame 162, the connecting piece 19 and the spring 1B can be assembled and connected first, at this time, under the elastic extrusion force of the spring 1B, the rollers 17 slide inward and gather together, and the diameter of the construction circle where the axes of the rollers 17 are located is the smallest, so that the peristaltic pump with accurate flow control can be assembled with the housing 121 conveniently;

on the other hand, the housing 121, the rotating member 15 and the screw member 14 are connected and assembled, then the conveying pipe 13 is wound on the periphery of the roller 17 and then connected and assembled with the housing 121, after the assembly, the blocking member 152 can be pressed to be located at the unlocking position, the rotating member 15 is driven to slide to the clamping position by applying force, at the moment, the clamping teeth 154 and the clamping grooves 1212 are in butt joint fit, so that the screw member 14 can be rotated, the extrusion amount of the screw member 14 on the connecting member 19 is adjusted, and the extrusion amount of the roller 17 on the conveying pipe 14 is adjusted.

The accurate control peristaltic pump of flow of this embodiment can adjust the position between mount and the adjustable shelf through adjusting part after assembling to can adjust the running roller to the extrusion volume of conveyer pipe, both made things convenient for the assembly, also make simultaneously and according to the fluid output condition, adjust the pressure between running roller and the conveyer pipe, reach the purpose to the accurate control of flow.

Referring to fig. 7 and 8, a second embodiment of the peristaltic pump with precise flow control according to the present invention is shown below.

A peristaltic pump capable of accurately controlling flow comprises a rotating frame, a motor 21, rollers, a shell 23 and a conveying pipe 26.

The motor 21 is connected with the rotating frame to drive the rotating frame to rotate; the roller wheels are rotationally arranged on the periphery of the rotating frame, and the rotating axis of the roller wheels is parallel to the rotating 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 arranged on the periphery of the rotating frame in a surrounding mode and is arranged between the wheel surface of the roller and the inner wall surface of the shell 23 in an extruding mode, the rotating frame rotates to enable the roller to roll and extrude along the conveying pipe 26, then the liquid in the conveying pipe 26 is driven to flow, the structure and the principle of pumping the fluid are consistent with those of the first embodiment, and therefore the attached drawing of the first embodiment can also be referred.

In this embodiment, the output shafts are extended from both ends of the motor 21, 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, the transmission system is a planetary gear system, the output shaft at the other end is connected to a magnetic ring 27, the peristaltic pump further comprises a hall assembly 2A, a plurality of pairs of magnetic poles are arranged on the magnetic ring 27, the hall assembly 2A is located on one side of the magnetic ring 27, the hall assembly 2A is used for sensing the switching of the magnetic poles of the magnetic ring 27 to calculate the number of rotation turns, and further calculate the flow rate of the peristaltic pump, the number of turns which is more precise can be calculated by using a multi-pole magnetic ring, and the control of the flow rate is also more precise.

One end of the motor 21 is connected with a circuit component 211, and the circuit component 211 is electrically connected with the motor 21 and the hall component 2A.

Referring to fig. 7 and 8, in the present embodiment, the peristaltic pump further includes a base shell 221, a cover 222, a brake ring 28, a friction ring 29, and a driving member 24.

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 disposed in the base shell 221, the cover 222 wraps the peripheries of the magnetic ring 27 and the brake ring 28 and is connected with the base shell 221, the friction ring 29 is movably disposed on the inner wall of the cover 222, and the driving member 24 is connected with the base shell 221 and is used for driving the friction ring 29 to move, so as to control the friction ring 29 to contact with or be away from the brake ring 28.

Wherein, the two ends of the conveying pipe 26 are respectively a liquid inlet and a liquid outlet. The peristaltic pump further includes an inlet check valve 261 and an outlet check valve 262, the inlet check valve 261 being connected to the inlet port and the outlet check valve 262 being connected to the outlet port. The liquid inlet switch handle 2611 used for controlling opening and closing is arranged on the liquid inlet check valve 261 in a rotating mode, the liquid outlet switch handle 2621 used for controlling opening and closing is arranged on the liquid outlet check valve 262 in a rotating mode, and the driving piece 24 is connected with the liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 through the connecting rod assembly.

When the driving piece 24 controls the friction ring 29 to be in contact with the brake ring 28, the connecting rod assembly drives the liquid inlet switch handle 2611 to be closed, and the connecting rod assembly drives the liquid outlet switch handle 2621 to be closed.

When the driving piece 24 controls the friction ring 29 to be far away from the brake ring 28, the connecting rod assembly drives the liquid inlet switch handle 2611 to be opened, and the connecting rod assembly drives the liquid outlet switch handle 2621 to be opened.

Therefore, when the motor 21 stops working, the friction ring 29 can be in contact with the brake ring 28, the output shaft of the motor 21 is guaranteed to stop stably, meanwhile, the liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 are driven and controlled to be closed, fluid backflow is prevented, and the accuracy of flow control is improved. And two structures are driven by the same driving piece 24, so that the cost is low, the efficiency is high, and the synchronism is good.

In this embodiment, please refer to fig. 7 and fig. 10. The friction ring 29 has lugs 291 symmetrically disposed at opposite ends thereof, and the lugs 291 extend through the cover 222. As shown in fig. 10, a through slot for the lug 291 to extend through is provided on the cover 222, and one side of the through slot is an unclosed opening for facilitating the installation of the lug, and the opening of the through slot is shielded by the base shell 221.

Referring to fig. 7, the connecting rod assembly includes a driving plate 251 and first connecting plates 252 symmetrically disposed at two ends of the driving plate 251, the driving member 24 is connected to the driving plate 251, and one first connecting plate 252 is correspondingly connected to one lug 291. Wherein the driving member 24 can be a linear driving device such as an electric push rod, an electric cylinder, etc.

Referring to fig. 12, the liquid inlet and the liquid outlet of the delivery pipe 26 extend from the same side of the housing 23, the connecting rod assembly further includes a second connecting plate 253, one end of the second connecting plate 253 is connected to the driving plate 251, two sides of the other end are provided with two supporting rods (as shown in fig. 12, the two supporting rods can be connected into an integral structure), the supporting rods are provided with elongated grooves 2531, and the liquid inlet switch handle 2611 and the liquid outlet switch handle 2621 are respectively movably connected to one elongated groove 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.

In this embodiment, one side surface of the base shell 221 is an arc-shaped surface, the driving plate 251 is an arc-shaped plate, and the driving plate 251 slides and flatly abuts on the surface of the base shell 221, so that the sliding is stable.

In addition, the base shell is provided with a first sliding sleeve 223, a first connecting plate 252 penetrates through the first sliding sleeve 223 and forms a sliding connection, the housing 23 is provided with a second sliding sleeve 231, and a second connecting plate 253 penetrates through the second sliding sleeve 231 and forms a sliding connection, so that stability of driving sliding is provided.

Referring to fig. 11, in the present embodiment, a fastening column 2521 is disposed at an end of the first connecting plate 252, and the connecting rod assembly further includes a screw 2B1, a nut, a rotating ring 2B3, and a rotating cover 2B2.

The screw head of the screw 2B1 is provided with a connecting hole for being connected with the connecting column 2521 in a clamped mode, and the nut is connected with the screw 2B1 in a threaded mode.

The lug 291 is provided with an open slot 2911, the periphery of the open slot 2911 is provided with a switching convex portion 2912, the rotating ring 2B3 is rotatably connected with the switching convex portion 2912, the rotating axis is consistent with the axial center line of the screw 2B1, the rotating ring 2B3 is a non-closed ring with a fracture and is convenient to assemble, the rotating cover 2B2 is fixedly connected with the rotating ring 2B3, the screw 2B1 penetrates through the open slot 2911 and the rotating cover 2B2, the rotating cover 2B2 wraps the nut to drive the nut to rotate, so that the moving stroke of the friction ring 29 can be adjusted, wherein the inner side of the rotating cover 2B2 is an inner hexagonal cavity matched with the nut.

The rotary cover 2B2 and the rotary ring 2B3 can be connected by clamping, welding, or other conventional methods. As shown in fig. 11, a fixing post may be provided on the rotating ring 2B3, and a fixing hole matching the fixing post may be provided on the rotating cover 2B2.

It is understood that the nut may also be made as an integral, non-standard structure with the rotary cap 2B2. The advantage of the split construction of the nut and the rotating cap 2B2 is that the nut is a standard piece, which is inexpensive to obtain, and the rotating cap 2B2 can continue to be used even if the nut is damaged.

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

In this embodiment, the peristaltic pump may also be provided with the structure of the first embodiment. For example, the peristaltic pump may further comprise an adjusting assembly, and the rotating frame may further comprise a fixed frame and a movable frame.

The adjustable shelf slides and sets up all sides at the mount, and the running roller rotates and sets up the inboard at the adjustable shelf, and the axis of a plurality of running rollers is located same structure circle, and the sliding direction of adjustable shelf is along the diameter direction of structure circle, and adjusting part sets up on casing 23, and adjusting part is connected with the adjustable shelf for the drive adjustable shelf slides, thereby adjusts the distance between the running roller.

Wherein, the adjusting component comprises a screw rod, a connecting rod and a connecting piece.

The connecting piece is located the inside of mount, and the week side of connecting piece all is through connecting rod and the adjustable shelf swing joint that corresponds, screw rod spare and 23 threaded connection of casing, and screw rod spare and connecting piece keep away from the one side rotation connection of connecting rod.

Furthermore, the fixing frame is provided with a mounting hole, the adjusting assembly further comprises a spring, the spring and the connecting piece are both located in the mounting hole, the spring is connected between the inner wall of the mounting hole and the connecting piece, the spring is located on the other side opposite to the screw rod piece, and the spring is always in a compression state in the sliding stroke of the movable frame.

The fixing frame comprises a fixing cylinder, a bottom plate and a top plate which are arranged in parallel, the fixing cylinder is arranged between the bottom plate and the top plate, and the mounting hole penetrates through the top plate and slides into the fixing cylinder.

The screw rod piece is close to the one end of connecting piece and is connected with flat bearing, and flat bearing and connecting piece contact, connecting piece include first retaining member and second retaining member, and the both sides that the connecting rod was kept away from the one end of adjustable shelf are provided with the rotary column, and first retaining member and second retaining member rotate the centre gripping rotary column.

The specific content of adjusting the rotating frame by the adjusting assembly is not described herein, and reference may be made to the first embodiment.

The working principle of the peristaltic pump with accurate flow control of the embodiment is as follows: the motor 21 drives the rotating frame to rotate so as to squeeze the delivery pipe 26 to pump fluid, and while the motor 21 works, the driving piece 24 drives the friction ring 29 to be away from the brake ring 28, the liquid inlet switch handle 2611 is driven to open the liquid inlet check valve 261, and the liquid outlet switch handle 2621 is driven to open the liquid outlet check valve 262.

When the motor 21 stops working, the driving element 24 receives a signal and synchronously drives the friction ring 29 to contact with 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 static state, and simultaneously prevents the backflow of fluid, and the flow rate is more accurately controlled.

The accurate control peristaltic pump of flow of this embodiment utilizes multipolar magnetic ring can calculate more meticulous number of turns, and is also more accurate to the control of flow simultaneously.

In addition, the driving part is arranged, the driving friction ring is in contact with or far 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 in a static state, meanwhile, the backflow of fluid is prevented, and the accuracy of flow control is improved.

In summary, although the present invention has been described with reference to the above embodiments, the above embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention is defined by the appended claims.

Claims (10)

1. A roller adjusting structure of a peristaltic pump is characterized by comprising a rotating frame, rollers, a shell and an adjusting assembly, wherein the shell is connected to the outside of the rotating frame, a conveying pipe is arranged between a roller surface of each roller and the inner wall surface of the shell, and the rotating frame rotates to enable the rollers to roll and extrude along the conveying pipe so as to drive liquid in the conveying pipe to flow;

the rolling stand includes mount and adjustable shelf, the adjustable shelf slides and sets up week side of mount, the running roller rotates and sets up the inboard of adjustable shelf, and is a plurality of the axis of running roller is located same structure circle, the slip direction of adjustable shelf is along the diametral of structure circle, adjusting part sets up on the casing, adjusting part with the adjustable shelf is connected, is used for the drive the adjustable shelf slides, thereby adjusts distance between the running roller.

2. A roller adjustment structure of a peristaltic pump as claimed in claim 1, wherein the fixed frame includes a fixed cylinder, and a bottom plate and a top plate disposed in parallel, the fixed cylinder is disposed between the bottom plate and the top plate, the bottom plate and the top plate are both provided with sliding grooves for limiting sliding of the movable frame, and the movable frame is provided with sliding blocks adapted to the sliding grooves;

the adjusting assembly comprises a screw rod, a connecting rod and a connecting piece; the connecting piece is located the inside of mount, all side of connecting piece is all passed through the connecting rod with correspond the adjustable shelf swing joint, the screw member with casing threaded connection, just the screw member with the connecting piece is kept away from the one side of connecting rod is rotated and is connected.

3. A roller adjustment structure of a peristaltic pump as claimed in claim 2, wherein the fixing frame is provided with a mounting hole, the mounting hole penetrates through the top plate and the fixing cylinder, the adjustment assembly further comprises a spring, the spring and the connecting member are both located in the mounting hole, the spring is connected between the bottom wall of the mounting hole and the connecting member, the spring is located on the other side opposite to the screw member, and the spring is always in a compressed state during a sliding stroke of the movable frame.

4. A roller adjusting structure of a peristaltic pump as set forth in claim 3, wherein a flat bearing is connected to an end of the screw member close to the connecting member, the flat bearing being in contact with the connecting member, the connecting member including a first locking member and a second locking member, the rotating post being provided on both sides of an end of the connecting rod away from the movable frame, the first locking member and the second locking member clamping the rotating post so that the rotating post is rotatably connected to the connecting member.

5. A roller adjustment structure for a peristaltic pump as set forth in claim 4, wherein said connecting member is of a square configuration; 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 is assembled with the connecting rod in the forward direction.

6. A roller adjustment structure for a peristaltic pump as recited in claim 3, wherein the adjustment assembly further includes a rotating member movably coupled to the housing, the screw member is threadedly coupled to the rotating member, the rotating member includes a retaining portion and a rotating portion on a path of movement of the housing, the retaining portion being closer to the connecting member than the rotating portion;

when the rotating piece is located at the rotating position, the rotating piece can rotate relative to the shell, and the rotating axis of the rotating piece is coaxial with the axial center line of the screw rod piece, so that the screw rod piece 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 relative rotation can be carried out between the screw rod piece and the rotating piece.

7. A roller adjusting structure of a peristaltic pump as set forth in claim 1, wherein said housing is provided with a receiving groove for mounting said rotating member, said rotating member is provided with teeth on peripheral sides thereof, said receiving groove is provided with a groove corresponding to said teeth on inner walls thereof, said teeth are connected to said groove when said rotating member is located in said engaging position, and said teeth are misaligned to said groove when said rotating member is located in said engaging position.

8. A roller adjustment structure for a peristaltic pump as set forth in claim 1, wherein said rotating member includes a pressing portion extending to project outside of said housing, said pressing portion being adapted to be pressed to cause said rotating member to slide toward said retaining position.

9. A roller adjustment structure of a peristaltic pump as claimed in claim 8, wherein the two opposite sides of the rotating member are respectively provided with a pressing portion, one end of the pressing portion, which is away from the rotating member, is rotatably provided with a blocking member, a first end of the blocking member is located on a side of the pressing portion, which is away from the housing, a second end of the blocking member is located on a side of the pressing portion, which is close to the housing, a torsion spring is arranged on a rotating shaft between the blocking member and the pressing portion, and the blocking member includes a locking position and an unlocking position on a rotating track;

when the blocking piece is located at the locking position, the second end of the blocking piece is limited between the pressing part and the shell, so that the rotating part is limited from sliding to the clamping position, and the torsion spring drives the rotating part to be kept at the locking position;

when the blocking piece is located at 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 towards the periphery, the pressing parts can approach the shell, and the rotating part can slide towards the clamping position.

10. A roller adjustment structure for a peristaltic pump as claimed in claim 9, wherein the first end of the blocking member is of an arcuate configuration, the first end of the blocking member is recessed from a side of the screw member, and the pressing portion is provided with a clearance hole for clearance of the first end of the blocking member.

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