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CN-224214317-U - High-pressure infusion pump for high-performance liquid chromatography system

CN224214317UCN 224214317 UCN224214317 UCN 224214317UCN-224214317-U

Abstract

The utility model discloses a high-pressure infusion pump for a high-performance liquid chromatography system, which comprises a driving module and a pump module, wherein the driving module comprises a stepping motor and a driving shell, a transmission cavity is formed in the driving shell, the output end of the stepping motor is connected with an eccentric shaft, the eccentric shaft is provided with a light measuring sheet, a photoelectric sensor is arranged on the driving shell, the photoelectric sensor is correspondingly arranged towards the light measuring sheet, the pump module comprises a pump body and a pump head, a linear bearing is arranged in the pump body in a penetrating manner, a push rod is correspondingly inserted in the linear bearing, one end of the push rod is correspondingly in transmission connection with the eccentric shaft, the other end of the push rod is connected with a plunger seat, a one-way valve is arranged on the pump head, a butt joint groove is formed on one side, close to the pump module, of the wall of the butt joint groove is gradually reduced from the opening of the butt joint groove to the bottom end of the butt joint groove along the axial direction of the groove, so that a step structure is formed.

Inventors

  • SUN CHENGGANG

Assignees

  • 上海盛拓医疗器械有限公司

Dates

Publication Date
20260508
Application Date
20250603

Claims (7)

  1. 1. A high pressure infusion pump for a high performance liquid chromatography system, comprising: The driving module comprises a stepping motor and a driving shell, a transmission cavity is formed in the driving shell, a driving hole, a detection hole and an output hole are formed in the driving shell, the driving hole, the detection hole and the output hole are all communicated with the transmission cavity, an eccentric shaft is connected in the transmission cavity in a manner that the output end of the stepping motor is correspondingly inserted into the transmission cavity along the driving hole, a light measuring sheet is arranged on one side, far away from the stepping motor, of the eccentric shaft, extending out of the driving shell along the detection hole, a photoelectric sensor is arranged on one side, corresponding to the detection hole, of the driving shell, and the photoelectric sensor is correspondingly arranged towards the light measuring sheet; The pump module comprises a pump body and a pump head, one end of the pump body is correspondingly connected with the driving shell, the other end of the pump body is correspondingly connected with the pump head, a one-way valve is arranged on the pump head, a linear bearing is arranged in the pump body in a penetrating manner, a push rod is correspondingly inserted in the linear bearing, one end of the push rod is correspondingly in transmission connection with the eccentric shaft through a transmission bearing, a first elastic element is sleeved on one end, corresponding to the position, close to the eccentric shaft, of the push rod, the other end of the push rod is connected with a plunger seat, a plunger rod is arranged on one end, away from the push rod, of the plunger seat, a one-way valve is arranged on the pump head, a flow channel communicated with the one-way valve is arranged in the pump head, and the plunger rod correspondingly extends into the flow channel; The pump comprises a pump body, and is characterized in that a butt joint groove is formed in one side, close to the pump module, of the drive housing, the groove wall of the butt joint groove is gradually reduced from an opening of the butt joint groove to the bottom end of the groove to form a step structure, a butt joint part is arranged on one side, facing the drive housing, of the pump body, and the butt joint part is correspondingly and adaptively clamped with the step structure.
  2. 2. The high pressure infusion pump for a high performance liquid chromatography system as set forth in claim 1, wherein, The driving hole and the detecting hole are respectively provided with a first bearing and a second bearing, the first bearing and the second bearing are sleeved on the eccentric shaft, and a wave spring is arranged between the second bearing and the eccentric shaft.
  3. 3. The high pressure infusion pump for a high performance liquid chromatography system of claim 2, further comprising: The cleaning block is arranged on the pump body and is correspondingly close to one end of the pump head, and a diaphragm is arranged between the cleaning block and the pump body.
  4. 4. The high pressure infusion pump for a high performance liquid chromatography system as claimed in claim 3, wherein, A cushion pad piece is arranged between the stepping motor and the driving shell.
  5. 5. The high pressure infusion pump for a high performance liquid chromatography system according to any one of claims 1-4, wherein, The junction between the pump head and the pump body is provided with first sealing member.
  6. 6. The high pressure infusion pump for a high performance liquid chromatography system as recited in claim 5, wherein, A notch is formed in the light measuring sheet; The rotation path of the light detecting sheet is correspondingly overlapped with the sensing position of the photoelectric sensor.
  7. 7. The high pressure infusion pump for a high performance liquid chromatography system as recited in claim 6, wherein, The pump body is provided with a waste liquid port for discharging leakage liquid.

Description

High-pressure infusion pump for high-performance liquid chromatography system Technical Field The utility model relates to the technical field of mechanical equipment, in particular to a high-pressure infusion pump of a high-performance liquid chromatography system. Background The high-pressure infusion pump is a key component in the high-performance liquid chromatography technology, provides stable and continuous mobile phases for the high-performance liquid chromatography system, ensures that samples uniformly enter a chromatographic column and are separated efficiently, has the function of outputting the high-pressure mobile phases so as to overcome the resistance of the chromatographic column packing, and can realize the flow repetition stability so as to ensure the repeatability and accuracy of analysis results. Therefore, there is a need to develop a high pressure infusion pump for a high performance liquid chromatography system to solve the technical problems encountered in the prior art. Disclosure of utility model In view of the above, an object of the present utility model is to provide a high-pressure infusion pump for a high-performance liquid chromatography system, which can solve the above-mentioned problems. In order to achieve the above object, the present utility model provides a high pressure infusion pump for a high performance liquid chromatography system, comprising: The driving module comprises a stepping motor and a driving shell, a transmission cavity is formed in the driving shell, a driving hole, a detection hole and an output hole are formed in the driving shell, the driving hole, the detection hole and the output hole are all communicated with the transmission cavity, an eccentric shaft is connected in the transmission cavity in a manner that the output end of the stepping motor is correspondingly inserted into the transmission cavity along the driving hole, a light measuring sheet is arranged on one side, far away from the stepping motor, of the eccentric shaft, extending out of the driving shell along the detection hole, a photoelectric sensor is arranged on one side, corresponding to the detection hole, of the driving shell, and the photoelectric sensor is correspondingly arranged towards the light measuring sheet; The pump module comprises a pump body and a pump head, one end of the pump body is correspondingly connected with the driving shell, the other end of the pump body is correspondingly connected with the pump head, a one-way valve is arranged on the pump head, a linear bearing is arranged in the pump body in a penetrating manner, a push rod is correspondingly inserted in the linear bearing, one end of the push rod is correspondingly in transmission connection with the eccentric shaft through a transmission bearing, a first elastic element is sleeved on one end, corresponding to the position, close to the eccentric shaft, of the push rod, the other end of the push rod is connected with a plunger seat, a plunger rod is arranged on one end, away from the push rod, of the plunger seat, a one-way valve is arranged on the pump head, a flow channel communicated with the one-way valve is arranged in the pump head, and the plunger rod correspondingly extends into the flow channel; The pump comprises a pump body, and is characterized in that a butt joint groove is formed in one side, close to the pump module, of the drive housing, the groove wall of the butt joint groove is gradually reduced from an opening of the butt joint groove to the bottom end of the groove to form a step structure, a butt joint part is arranged on one side, facing the drive housing, of the pump body, and the butt joint part is correspondingly and adaptively clamped with the step structure. In some embodiments, a first bearing and a second bearing are disposed in the drive aperture and in the sense aperture respectively, the first bearing and the second bearing are both sleeved on the eccentric shaft, and a wave spring is arranged between the second bearing and the eccentric shaft. In some embodiments, the high pressure infusion pump for high performance liquid chromatography systems provided by the present utility model further comprises: The cleaning block is arranged on the pump body and is correspondingly close to one end of the pump head, and a diaphragm is arranged between the cleaning block and the pump body. In some embodiments, a cushion member is disposed between the stepper motor and the drive housing. In some embodiments, a first seal is provided at a junction between the pump head and the pump body. In some embodiments, the light shielding sheet is provided with a notch; The rotating path of the shading sheet is correspondingly overlapped with the sensing position of the photoelectric sensor. In some embodiments, the pump body is provided with a waste port for discharging leakage liquid. Compared with the prior art, the high-pressure infusion pump for the high-performance liquid chromatograph