CN201068852Y - Peristaltic pump - Google Patents

Abstract

The utility model relates to a peristaltic pump, it is to the slot further improvement of its lid, makes the internal face of its lid slot have according to the preface integrated into one piece: a pressing surface, a first gradually relaxing surface, a tightening part and a second gradually relaxing surface; the surfaces can cooperate with rollers to control fluid flow in a transfer tube, such as: the pressing surface can press the transmission pipe to enable fluid at one end of the transmission pipe to be sucked; the first gradually relaxing surface can enable one end of the transmission pipe to gradually relax, so that fluid in the transmission pipe slowly and gradually flows out; the packing part can press against the transmission pipe to avoid the backflow of the fluid; the second gradually relaxing surface can gradually relax the conveying pipe, so that the residual fluid in the conveying pipe slowly and gradually flows out of the conveying pipe. Thereby enabling to increase the smoothness in fluid delivery and the stability in fluid outflow dose control.

Description

Peristaltic pump

technical field

The utility model relates to a pump, in particular to a peristaltic pump which can increase the smoothness of fluid delivery and the stability of fluid outflow dose control.

Background technique

Peristaltic pump is a kind of fluid conveying device, which can effectively avoid the pollution caused by the pump itself and the fluid contact through the way that the fluid is completely conveyed in the pipe, and its metering is accurate and easy to maintain, so it is more and more widely used Used in the transportation of biochemical, pharmaceutical products and corrosive fluids.

As shown in Figure 4, the peristaltic pump in the prior art generally has a base body 40, a transmission pipe 50 and a cover body 60, wherein a transmission wheel set 41 protrudes from the base body 40, and the drive wheel set 41 is a disc body, which can be rotated by a motor (not shown in the figure), and several freely rolling rollers 410 are pivotally arranged around its periphery equidistantly; One side is attached to part of the roller 410; the cover body 60 is covered on the seat body 40, and a semi-arc-shaped groove 61 is recessed on the surface opposite to the seat body 40, and the groove 61 can be used for the transmission pipe 50 The wall at one end expands to form a diastolic surface E, and the distance between the diastolic surface E and the roller 410 is greater than the diameter of the transmission tube 50; and the wall outside the diastolic surface E is pressed against the transmission tube 50 is opposite to the other side of the roller 410, and the roller 410 mutually presses the transfer tube 50 to form a closed state.

In this way, when the motor drives the transmission wheel set 41 to rotate, the roller 410 and the inner wall of the groove 61 can squeeze the transmission tube 50, so that the fluid at one end of the transmission tube 50 is drawn, and the fluid transmitted between the adjacent rollers 410 The flow in the tube 50 , and then through the relaxation of the other end of the transmission tube 50 on the diastolic plane E, and flow out from the other end of the transmission tube 50 .

However, in the peristaltic pumps of the prior art, the way the fluid in the delivery tube 50 flows out through the diastolic surface E of the groove 61 often causes the delivery tube 50 to dilate instantaneously at the diastolic surface E, causing the internal fluid to collapse due to a sudden drop in pressure. Flow out of the transfer tube 50 in a large amount of ejection; in addition, after the fluid flows out of the transfer tube 50, a vacuum state will be formed in the transfer tube 50, resulting in backflow of the ejected fluid, resulting in unsmooth delivery of the fluid, and fluid Instability in outflow dose control.

Utility model content

The purpose of this utility model is to provide a peristaltic pump, which can avoid the rapid ejection and backflow of the fluid in the transmission pipe, so as to increase the smoothness of the fluid delivery and the stability of the fluid outflow dose control.

In order to achieve the aforementioned purpose, the structure of the peristaltic pump of the present utility model is roughly the same as that of the prior art, and it is further improved on the cover groove. The peristaltic pump includes a base, a transmission pipe and a cover, Wherein, the seat body is provided with a transmission wheel group, and several roller wheels that can roll freely are arranged around the periphery at equal distances;

One side of the transmission tube is attached to a part of the roller;

The cover body is covered on the seat body, and a groove is recessed on the surface opposite to the seat body, and the groove is used for accommodating the transmission pipe, and the groove is sequentially integrally formed with respect to the inner wall surface of the roller:

a pressing surface, which has the same and specific radius of curvature, and the pressing surface cooperates with the roller to sandwich and seal the transmission pipe body;

a first gradually relaxing surface, which is continuously formed at one end of the pressing surface, and has a gradually increasing radius of curvature;

A pressing part, which is protrudingly formed on the other end of the first gradually relaxing surface opposite to the pressing surface, and the pressing part cooperates with the rollers to clamp the transmission pipe body;

A second gradual relaxation surface, which is continuously formed at the other end of the tightening portion relative to the first gradual relaxation surface, also has a gradually increasing radius of curvature, and the radius of curvature at the terminal end is equal to or greater than the diameter of the transmission pipe.

The above-mentioned peristaltic pump, wherein, the distance between the end of the second gradually expanding surface of the groove of the cover body and the opposite roller is equal to the diameter of the transmission pipe.

The above-mentioned peristaltic pump, wherein, the distance between the end of the second gradually expanding surface of the groove of the cover body and the opposite roller is greater than the diameter of the transmission pipe.

The above-mentioned peristaltic pump, wherein, the transmission wheel set protrudes from the surface of the seat body, and is in the form of a disk, and the center is fixedly connected to a transmission shaft of a motor.

The above-mentioned peristaltic pump, wherein, one side of the seat is fixed with a fastener; one side of the cover is pivotally arranged on the seat, and the other side is provided with a clasp opposite to the clasp, and the clasp is connected with the clasp Snap together.

The above-mentioned peristaltic pump, wherein, the transmission wheel set has six rollers.

With the help of this improved structure, when the peristaltic pump of the present invention drives the transmission wheel set to rotate with the motor, the roller and the pressing surface can squeeze the transmission tube, so that the fluid at one end of the transmission tube is drawn, and between the adjacent rollers Then, through the cooperation between the roller and the first gradual relaxation surface, one end of the transmission tube is gradually expanded, so that the fluid in the transmission tube can flow out slowly and gradually; after that, when the roller rotates to the tight part , the transmission tube can be pressed against the tight part again to be in a semi-closed state, so that the aforementioned outflowing fluid will be difficult to flow back, but can only flow out to the other end of the transmission tube; after that, the transmission tube can pass through the roller and the second The cooperation of the gradual relaxation surface gradually relaxes, so that the remaining fluid in the transmission tube flows out of the transmission tube slowly and gradually.

It can be seen from the above that the peristaltic pump of the present utility model can effectively prevent the fluid inside the transmission tube from flowing out of the transmission tube in a large amount due to the sudden drop in pressure; in addition, it can also avoid the backflow of the fluid after spraying, so the fluid delivery can be increased The smoothness on the screen, and the stability on the control of the fluid outflow dose.

Description of drawings

Fig. 1 is the appearance perspective view of the utility model;

Figure 2 is a front view of the cover;

Fig. 3 is a schematic diagram of the actuation state of the utility model;

Fig. 4 is a schematic diagram of the operating state of the peristaltic pump in the prior art.

Explanation of reference numbers:

10. Seat body 11. Transmission wheel set

110. Roller 12. Buckle

20. Transfer tube 30. Cover

31. Buckle hook 32. Groove

A. The pressing surface B. The first gradually relaxing surface

C. The tight part D. The second gradually relaxed part

40. Seat body 41. Transmission wheel set

410, roller 50, transmission tube

60. Cover body 61. Groove

E. Diastolic surface

Detailed ways

Please refer to Fig. 1, the peristaltic pump of the present invention includes a base 10, a transmission pipe 20 and a cover 30, wherein:

The base body 10 is provided with a motor (not shown), a transmission wheel set 11 and a fastening member 12, wherein the transmission wheel set 11 protrudes from the surface of the base body 10, and it is a plate, the center of which is connected to the motor. The transmission shafts are fixedly connected to each other and can be driven by the motor to rotate. Six freely rolling rollers 110 are equidistantly around the periphery of the drive shafts;

The transmission pipe 20 is located on the base body 10, surrounds half of the outer edge of the transmission wheel set 11 at the middle section, and abuts against part of the rollers 110 with one side; a flow channel is formed in the transmission pipe 20 and has a pipe thickness.

The cover 30 is pivotally arranged on the seat 10 on one side, and a hook 31 is provided on the other side corresponding to the fastener 12, and the hook 31 can be interlocked with the fastener 12 so that the cover 30 is opposite to the seat. 10 positioning; the cover body 30 is covered on the seat body 10, and a groove 32 is recessed on the surface opposite to the seat body 10. Please refer to FIG. 2 and FIG. Accommodated, and the groove 32 is sequentially integrally formed with respect to the inner wall surface of the roller 110 as follows:

A pressing surface A, which has the same and specific radius of curvature, and the distance between it and the relative roller 110 is equal to or less than the thickness of the transmission pipe 20, can cooperate with the relative roller 110 to sandwich the transmission pipe 20, so that the transmission The tube 20 forms a closed state;

A first gradual relaxation surface B, which is continuously formed at one end of the pressing surface A, has a gradually increasing radius of curvature, and the distance between it and the relative roller 110 is gradually greater than the thickness of the transmission tube 20, so that the transmission tube 20 can be gradually expanded;

A pressing part C, which is protrudingly formed on the other end of the first gradually relaxing surface B opposite to the pressing surface A, and the distance between it and the opposite roller 110 is slightly larger than the thickness of the transmission tube 20, and can be clamped with the opposite roller 110 The pipe body of the transmission pipe 20 makes the transmission pipe 20 form a semi-closed state;

A second gradual relaxation surface D, which is continuously formed at the other end of the pressing portion C relative to the first gradual relaxation surface B, also has a gradually increasing radius of curvature, and the distance between it and the opposite roller 110 is gradually greater than the thickness of the transmission pipe 20 , the transmission tube 20 can be stretched gradually, and the distance between the terminal end and the opposite roller 110 can be equal to or greater than the diameter of the transmission tube 20 .

Please refer to FIG. 3 in conjunction with FIG. 2. When the peristaltic pump of the present invention drives the drive wheel set 11 to rotate, the roller 110 and the pressing surface A can squeeze the transmission tube 20, so that the fluid at one end of the transmission tube 20 is drawn. And flow in the transmission tube 20 between each adjacent roller 110; Then, through the cooperation between the rollers 110 and the first gradual relaxation surface B, one end of the transmission tube 20 is gradually expanded, so that the fluid in the transmission tube 20 can be Slowly and gradually flow out; afterward, when the roller 110 rotates to the pressing part C, the transmission pipe 20 can be pressed against the pressing part C again to be in a semi-closed state, so that the aforementioned outflowing fluid will be difficult to return, and can only Flow out to the other end of the transmission tube 20; and thereafter, the transmission tube 20 can be gradually stretched by means of the cooperation of the roller 110 and the second gradual relaxation surface D, so that the remaining fluid in the transmission tube 20 slowly and gradually flows out of the transmission tube 20 , so as to increase the smoothness of fluid delivery and the stability of fluid outflow dose control.

Claims (6)

1. peristaltic pump, it includes a pedestal, a transport tube and a lid, it is characterized in that:

This pedestal is provided with a driving wheel group, and its periphery equidistantly can the free rolling roller around being pivoted with several;

One side of this transport tube is pasted and is butted on the part roller;

This lid is covered on the pedestal, and the surface of its relative pedestal is recessed on and is formed with a groove, and this groove is ccontaining for transport tube, and this groove has with respect to the internal face of roller is one-body molded in regular turn:

One press face, it has identical radius of curvature, and this press face and roller cooperatively interact and clamping and seal the transport tube body;

One first gradually easypro face, it continues and is formed at an end of press face, has the radius of curvature that increases progressively gradually;

One clamping part, it is outstanding to take shape in first the other end that gradually relaxes the relative press face of face, and this clamping part and roller cooperatively interact and clamping transport tube body;

One second gradually easypro face, it continues and is formed at the gradually the other end of easypro face of clamping part relative first, has the radius of curvature that increases progressively gradually.

2. peristaltic pump as claimed in claim 1 is characterized in that: gradually the relax spacing of face end and counter roller of second of described lid groove equals the caliber of transport tube.

3. peristaltic pump as claimed in claim 1 is characterized in that: the second gradually easypro face end of described lid groove and the spacing of counter roller, and greater than the caliber of transport tube.

4. as claim 1 or 2 or 3 described peristaltic pumps, it is characterized in that: the outstanding pedestal of described driving wheel group surface is provided with, and is a disk body, and the transmission shaft Joint of a centre and a motor.

5. as claim 1 or 2 or 3 described peristaltic pumps, it is characterized in that: described pedestal one side is installed with a button firmware; One side of lid is hubbed on the pedestal, and opposite side phase make-up firmware is provided with a button hook, and this button hook fastens mutually with the button firmware.

6. as claim 1 or 2 or 3 described peristaltic pumps, it is characterized in that: described driving wheel group has six rollers.

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