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CN-224228838-U - Cleaning mechanism and plunger pump with same

CN224228838UCN 224228838 UCN224228838 UCN 224228838UCN-224228838-U

Abstract

The utility model discloses a cleaning mechanism and a plunger pump with the same, wherein the cleaning mechanism comprises a first component and a second component, and the first component and the second component are integrally manufactured or assembled; the first component part comprises a hole part and a groove part, wherein the groove part is communicated with the communication hole of the second component part. The cleaning mechanism can be used for cleaning the grooves in the cavity and the sealing rings in the cavity by introducing fluid through the external circulating pump, so that impurities and the like in the working process of the plunger are effectively taken away through fluid flow, effective cleaning is realized, risks such as damage to the sealing rings and potential safety hazards are avoided, the service life of the plunger pump is prolonged, damage to the plunger pump or equipment caused by leakage is reduced, the cleaning mechanism can be directly installed in the existing plunger pump, special design change of the plunger pump is not needed, manufacturing and using costs are avoided, and the cleaning mechanism is better matched with other products.

Inventors

  • WANG XUEJING

Assignees

  • 上海鼎珂科技有限公司

Dates

Publication Date
20260512
Application Date
20250311

Claims (8)

  1. 1. A cleaning mechanism is characterized in that the cleaning mechanism (5) comprises a first component (51) and a second component (52), wherein, The first component (51) and the second component (52) are integrally manufactured or assembled; The first component part (51) comprises a hole part (511) and a groove part (512), wherein, The groove portion (512) communicates with a communication hole (522) of the second component portion (52); The second component part (52) has a communication hole (522) therein terminating in an opening (521) provided outside the second component part (52).
  2. 2. A cleaning mechanism according to claim 1, characterized in that the first component (51) is at the bottom of a cavity (513).
  3. 3. A cleaning mechanism according to claim 1, wherein the groove portion (512) and the communication hole (522) are provided in two, one-to-one correspondence.
  4. 4. A plunger pump having a cleaning mechanism as claimed in any one of claims 1 to 3, wherein the cleaning mechanism (5) is arranged between the housing part (2) and the end cap (3), wherein, The bottom of the end cover (3) is provided with a cavity inner groove (31).
  5. 5. A plunger pump according to claim 4, characterized in that a first plunger portion (61) and a second plunger portion (62) are provided in the housing portion (2), wherein, The second plunger portion (62) passes through the hole portion (511) of the first component portion (51).
  6. 6. A plunger pump according to claim 4, characterized in that an annular protrusion in the first component part (51) divided by the groove part (512) forms a separation of the cavity inner groove (31) and the cavity (513).
  7. 7. A plunger pump according to claim 4, characterized in that the communication hole (522) is connected to an external circulation pump.
  8. 8. A plunger pump according to claim 4, characterized in that the housing part (2) is connected with a power part (1), wherein, The screw rod (11) connected with the power part (1) is connected with the first plunger part (61); The end cover (3) can be connected with a control valve (4).

Description

Cleaning mechanism and plunger pump with same Technical Field The present utility model relates to a plunger pump for a pipetting device, and more particularly, to a cleaning mechanism and a plunger pump having the same. Background The plunger pump is a high-precision and high-reliability liquid transmission device in the pipetting technology and is widely applied to the fields of biological medicine, chemical analysis, molecular biology and the like. The core components of the device comprise a precisely machined plunger (piston), a pump body, a driving mechanism and a sealing system. The plunger reciprocates in the pump cavity through the driving of the motor or the mechanical device, negative pressure is formed when the plunger retracts, liquid is sucked into the cavity, positive pressure is generated when the plunger advances, and accurate discharge of the liquid is achieved. In the prior art, a plunger pump adopts a motor and a screw rod mechanism to directly drive a piston, so that the plunger pump performs high-precision linear reciprocating motion in a closed cavity, a dynamic sealing structure is formed between the cavity and the piston through a sealing ring which is precisely matched, and no leakage of liquid in the motion process is ensured. However, when the delivery liquid contains particulate impurities (e.g., unfiltered suspensions) or hard crystals (e.g., salting-out, organic solute deposition) formed upon drying of the volatile solvent, these impurities can cut into the sealing interface with the piston motion, resulting in seal scoring or even tearing. The leakage caused by the leakage can firstly corrode metal parts (such as a stainless steel plunger and an aluminum cavity) in the pump body and a transmission assembly, so that the mechanical life is reduced, if the leaked liquid has conductivity (such as an acid-base solution and an ion buffer solution), the leaked liquid can invade a trigger circuit of the motor unit along a screw rod to short, and electric sparks or equipment burning loss can be caused under extreme conditions, so that the experiment is interrupted or the safety risk is upgraded. If a special plunger pump is designed, the cost is increased due to the increase of cleaning of the plunger, and the plunger pump cannot be well matched with other products due to the change of structural design. Disclosure of Invention The utility model aims to solve the technical problems of easily damaging structures and the like by impurities in the existing plunger pump by providing a cleaning mechanism and the plunger pump with the mechanism. The technical problems to be solved by the utility model are realized by adopting the following technical scheme: the utility model provides a cleaning mechanism, which comprises a first component part and a second component part, wherein, The first component and the second component are integrally manufactured or assembled; The first component comprises a hole part and a groove part, wherein, The groove part is communicated with the communication hole of the second component part; The end of the communication hole in the second component part is an opening arranged outside the second component part. As a preferable technical scheme of the utility model, the bottom of the first component is a cavity. As a preferable technical scheme of the utility model, the two groove parts and the two communication holes are respectively arranged and correspond to each other one by one. The utility model also provides a plunger pump, which is provided with the cleaning mechanism, wherein the cleaning mechanism is arranged between the shell part and the end cover, The bottom of the end cover is provided with a cavity inner groove. As a preferred embodiment of the present utility model, the housing portion is provided therein with a first plunger portion and a second plunger portion, wherein, The second plunger portion passes through the hole portion of the first component. As a preferable embodiment of the present utility model, the annular projection in the first component divided by the groove portion forms a partition between the cavity inner groove and the cavity. As a preferable technical scheme of the utility model, the communication hole is connected with an external circulating pump. As a preferred embodiment of the present utility model, the housing portion is connected with a power portion, wherein, The screw rod connected with the power part is connected with the first plunger part; The end cap may also be connected with a control valve. The cleaning mechanism has the beneficial effects that fluid can be introduced into the groove in the cavity and the sealing ring in the cavity through the external circulating pump to clean the sealing ring, so that impurities and the like in the working process of the plunger are effectively taken away through fluid flow, the effective cleaning is realized, risks such as damage to the sealing ring and potential safety