Multifunctional efficient metering pump control equipment

Abstract

The utility model relates to the technical field of metering pumps, and discloses a multifunctional high-efficiency metering pump control device in order to achieve the purpose of effectively compensating unstable flow of conveyed liquid generated by extrusion pulses, which comprises a servo motor, a duplex bevel gear shaft, a hose and a pump shell, and the servo motor is sequentially connected with an encoder, a PLC (programmable logic controller) and a display; a large bevel gear is fixed at one end of a spindle sleeve, a main blade is fixed at the other end of the spindle sleeve, a small bevel gear is fixed at one end of a spindle, an auxiliary blade is fixed at the other end of the spindle, the spindle sleeve wraps an outer ring of the spindle, and two hoses are clamped among the pump shell, the main blade and the auxiliary blade. The two bevel gears on the duplex bevel gear shaft are matched with the large bevel gear and the small bevel gear, so that the main shaft sleeve and the main shaft generate differential rotation with a fixed rotation speed ratio, the rotation speed is sequentially transmitted to the main blade and the auxiliary blade, and therefore liquid is sucked stably and slowly in the pulse elimination and compensation process.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to multifunctional and efficient metering pump control equipment. Background Art

[0002] Peristaltic pump is a fine-tuning metering pump, which consists of a driver, a pump head and a peristaltic pump hose. It is a fluid delivery mechanical device that can control the flow rate. Its working principle is to drive the pump head to squeeze the hose to form a vacuum negative pressure through the motor, squeeze the fluid in the hose out, and the fluid outside the hose is sucked into the hose due to the pressure. It has the advantages of no pollution, high precision, good sealing, low shear force, bidirectional delivery, and can deliver corrosive liquids. Peristaltic pumps are widely used in the pharmaceutical industry and medical device industry to ensure that the amount of delivered drugs is accurate and pollution-free.

[0003] However, during the pumping process of the peristaltic pump, due to the alternating release of multiple pump heads and the squeezing of the hose, insufficient negative pressure at the moment of release will cause liquid back suction, resulting in a sudden decrease in the discharged liquid, leading to inevitable pulses in the process of liquid delivery by the peristaltic pump. The existing peristaltic pumps have not effectively solved this defect. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the utility model provides a multifunctional and efficient metering pump control device, which can effectively compensate for the unstable flow rate of the conveyed liquid generated by the squeezing pulse of the peristaltic pump.

[0006] (II) Technical solution

[0007] In order to effectively compensate for the unstable flow rate of liquid conveyed by extrusion pulses, the utility model provides the following technical solutions: a multifunctional and efficient metering pump control device, including a servo motor, a double bevel gear shaft, a hose and a pump housing. It is characterized in that the servo motor is connected to the encoder, PLC controller and display in sequence; the large bevel gear is fixed at one end of the main shaft sleeve, and the main blade is fixed at the other end; the small bevel gear is fixed at one end of the main shaft, and the auxiliary blade is fixed at the other end; the main shaft sleeve is wrapped around the outer ring of the main shaft and there is a clearance fit between the two, and the length of both ends of the main shaft is longer than the length of the main shaft sleeve; the two hoses are clamped between the pump housing and the main blade and the auxiliary blade.

[0008] Preferably, the two bevel gears on the double bevel gear shaft share a gear shaft, and the two bevel gears are fixed and rotated.

[0009] Preferably, the double bevel gear shaft is connected to the motor shaft of the servo motor via a coupling.

[0010] Preferably, the modules of the large bevel gear and the small bevel gear are the same, and the ratio of the number of teeth should be inversely proportional to the number of extrusion pulses.

[0011] Preferably, the fan angle of the main blade should be greater than the fan angle of the auxiliary blade.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a multifunctional and efficient metering pump control device, which has the following beneficial effects:

[0014] 1. This multifunctional and efficient metering pump control device achieves the effect of eliminating pulses by making the two bevel gears on the double bevel gear shaft cooperate with the large bevel gear and the small bevel gear, so that the main shaft sleeve and the main shaft produce differential rotation with a fixed speed ratio.

[0015] 2. This multifunctional and efficient metering pump control device can flexibly adjust the speed of the servo motor through the control of the encoder and PLC controller to meet the flow compensation of unstable liquid transport caused by different hose extrusion pulses.

[0016] 3. This multifunctional and efficient metering pump control device achieves stable and slow liquid suction during the pulse elimination and compensation process through the difference in the fan angles of the main blades and the auxiliary blades and the differential rotation with a fixed speed ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial structural isometric view of the multifunctional and efficient metering pump control equipment;

[0018] Figure 2 This is a partial structural front view of a multifunctional and efficient metering pump control device;

[0019] Figure 3 It is a partial structural side view of the multifunctional and efficient metering pump control equipment.

[0020] In the figure: 1-pump housing, 2-auxiliary blades, 3-main blades, 4-hose, 5-main shaft sleeve, 6-large bevel gear, 7-small bevel gear, 8-main shaft, 9-double bevel gear shaft, 10-coupling, 11-servo motor, 12-encoder, 13-PLC controller, 14 display. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 3 The partial structural axial view of the multifunctional and efficient metering pump control device includes a servo motor 11, a double bevel gear shaft 9, a hose 4 and a pump housing 1. The servo motor 11 is connected to the encoder 12, the PLC controller 13 and the display 14 in sequence. The two bevel gears on the double bevel gear shaft 9 share a gear shaft for fixed rotation, and the two bevel gears are respectively matched with the large bevel gear 6 and the small bevel gear 7. The main shaft sleeve 5 is fixed with the large bevel gear 6 at one end and the main blade 3 at the other end. The main shaft is fixed with the small bevel gear 7 at one end and the auxiliary blade 2 at the other end. The main shaft sleeve 5 is wrapped around the outer ring of the main shaft 8, and the two are relatively rotatable with a clearance fit. The length of the main shaft 8 should be longer than the length of the main shaft sleeve 5. The hose 4 is clamped between the pump housing 1 and the main blade 3 and the auxiliary blade 2. The large bevel gear 6 and the small bevel gear 7 have the same module, the ratio of the number of teeth should be inversely proportional to the number of extrusion pulses, and the fan angle of the main blade 3 should be greater than the fan angle of the auxiliary blade 2.

[0023] Working principle: PLC controller 13 and encoder 12 adjust the speed of servo motor 11, and the speed and torque of the motor shaft are transmitted to the double bevel gear shaft 9 through the connection of coupling 10, so that the two bevel gears on the double bevel gear shaft 9 have the same speed. The double bevel gear shaft transmits the speed by cooperating with the large bevel gear 6 fixed on the main shaft sleeve 5 and the small bevel gear 7 fixed on the main shaft 8. According to the speed ratio of each pair of active bevel gear and driven bevel gear, which is inversely proportional to the number of teeth, the large bevel gear 6 and the small bevel gear 7 obtain different speeds. Since the main shaft sleeve 5 is wrapped around the outer ring of the main shaft 8 with a gap, the two can rotate relative to each other, and further transmit their respective speeds to the main blade 3 fixed on the main shaft sleeve 5 and the auxiliary blade 2 fixed on the main shaft 8. At this time, the main blade 3 and the auxiliary blade 2 obtain different speeds to squeeze the two hoses respectively, but the speed ratio is determined and should be equal to the squeezing pulse, so as to eliminate the squeezing pulse and compensate for the flow error caused by the instability of the conveying liquid caused by the squeezing pulse.

[0024] In summary, the multifunctional and efficient metering pump control device achieves the effect of eliminating pulses by making the two bevel gears on the double bevel gear shaft 9 cooperate with the large bevel gear 6 and the small bevel gear 7, so that the main shaft sleeve 5 and the main shaft 8 produce differential rotation with a fixed speed ratio. The speed of the servo motor 11 is flexibly adjusted by the encoder 12 and the PLC controller 13 to meet the flow compensation of the unstable liquid conveyed by the squeezing pulses of different hoses 4. Through the difference in the fan angles of the main blade 3 and the auxiliary blade 2 and the differential rotation with a fixed speed ratio, the liquid can be sucked stably and slowly during the pulse elimination and compensation process.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional and efficient metering pump control device, comprising a servo motor (11), a double bevel gear shaft (9), a hose (4) and a pump housing (1), characterized in that: The servo motor (11) is connected to an encoder (12), a PLC controller (13) and a display (14) in sequence; a large bevel gear (6) is fixed to one end of a main shaft sleeve (5) and a main blade (3) is fixed to the other end; a small bevel gear (7) is fixed to one end of a main shaft (8) and a secondary blade (2) is fixed to the other end; the main shaft sleeve (5) is wrapped around the outer ring of the main shaft (8) and there is a clearance fit between the two; the lengths of both ends of the main shaft (8) are longer than the length of the main shaft sleeve (5); the hose (4) is clamped between the pump housing (1) and the main blade (3) and the secondary blade (2).

2. The multifunctional and efficient metering pump control device according to claim 1 is characterized in that: The two bevel gears on the double bevel gear shaft (9) share a gear shaft, and the two bevel gears are fixed and rotated.

3. The multifunctional and efficient metering pump control device according to claim 2 is characterized in that: The double bevel gear shaft (9) is connected to the motor shaft of the servo motor (11) through a coupling (10).

4. The multifunctional and efficient metering pump control device according to claim 1 is characterized in that: The modules of the large bevel gear (6) and the small bevel gear (7) are the same, and the ratio of the number of teeth should be inversely proportional to the number of extrusion pulses.

5. The multifunctional and efficient metering pump control device according to claim 1 is characterized in that: The fan angle of the main blade (3) should be greater than the fan angle of the auxiliary blade (2).

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