Plunger pump with cleaning structure

Abstract

The utility model discloses a plunger pump with a cleaning structure, which comprises a power part, a shell part, a plunger part, a cavity-shaped end cover and a sandwich structure, and is characterized in that the power part is connected with the shell part and forms a first cavity; the plunger part comprises a first plunger part and a second plunger part, the second plunger part can penetrate through a second cavity in the shell part, and a partition plate is arranged between the second cavity and the first cavity; a sandwich structure is arranged in the second cavity, and a containing part communicated with the outside is arranged in the sandwich structure; at least two communicating holes are formed in the containing part, and the containing part and the connecting hole are communicated through the communicating holes. The containing part is arranged in the sandwich structure, fluid is introduced from the outside through the connecting hole and the communicating hole for circulation, impurities and the like in the working process of the plunger can be effectively removed, effective cleaning is achieved, and risks such as damage to a sealing ring and potential safety hazards are avoided; the service life of the plunger pump is prolonged, and damage to the plunger pump or equipment caused by leakage is reduced.

Description

Technical Field

[0001] This utility model relates to a plunger pump for pipetting, and more particularly to a plunger pump with a cleaning structure. Background Technology

[0002] A plunger pump is a high-precision, high-reliability liquid transfer device used in pipetting technology, widely applied in fields such as biomedicine, chemical analysis, and molecular biology. Its core components include a precision-machined plunger (piston), pump body, drive mechanism, and sealing system. Driven by a motor or mechanical device, the plunger reciprocates within the pump chamber: when the plunger retracts, a negative pressure is created, drawing liquid into the chamber; when the plunger advances, a positive pressure is generated, achieving precise liquid discharge.

[0003] In existing technologies, plunger pumps use a motor and lead screw mechanism to directly drive the piston, enabling it to perform high-precision linear reciprocating motion within a sealed cavity. A dynamically sealed structure is formed between the cavity and the piston through a precisely matched sealing ring, ensuring no liquid leakage during operation. However, when the pumped liquid contains particulate impurities (such as unfiltered suspended solids) or hard crystals formed after the drying of volatile solvents (such as salt deposits or organic solute sediments), these impurities will cut into the sealing interface as the piston moves, causing scratches or even tears to the sealing ring. The resulting leakage will first corrode internal metal components of the pump (such as stainless steel plungers and aluminum cavities) and transmission components, reducing mechanical lifespan. If the leaking liquid is conductive (such as acid / alkali solutions or ion buffer solutions), it may enter the motor unit's trigger circuit along the lead screw, causing a short circuit. In extreme cases, this could lead to electrical sparks or equipment fires, resulting in experimental interruptions or escalating safety risks. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a plunger pump with a cleaning structure, which solves the problems such as leakage in existing plunger pumps.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] This utility model provides a plunger pump with a cleaning structure, including a power unit, a housing unit, a plunger unit, a cavity-shaped end cap, and a sandwich structure, wherein...

[0007] The power unit is connected to the housing unit and forms a first cavity;

[0008] The plunger section includes a first plunger section and a second plunger section, wherein...

[0009] The second plunger portion can penetrate the second cavity on the housing portion, and there is a partition between the second cavity and the first cavity;

[0010] The second cavity, wherein the sandwich structure is provided inside,

[0011] The sandwich structure has a receiving part that communicates with the outside.

[0012] As a preferred embodiment of this utility model, the receiving portion has at least two communicating holes, wherein,

[0013] The connecting hole connects the receiving part to the connecting hole.

[0014] In a preferred embodiment of this invention, the connecting hole is located within the housing portion.

[0015] At least two are provided, corresponding to the connecting holes.

[0016] As a preferred embodiment of this utility model, the end of the connecting hole is an opening provided on the housing portion.

[0017] As a preferred embodiment of this utility model, a cavity-shaped end cap is installed at the end of the housing portion, wherein a control valve may also be connected to the cavity-shaped end cap.

[0018] As a preferred embodiment of this invention, the sandwich structure further includes a first sealing portion and a second sealing portion, wherein...

[0019] The first sealing part is disposed on the upper part of the sandwich structure, and the second sealing part is disposed on the lower part of the sandwich structure.

[0020] As a preferred embodiment of this utility model, the lead screw at the end of the power unit is connected to the first plunger unit via a connecting part.

[0021] As a preferred embodiment of this utility model, the two openings and their connecting holes are used to connect an external circulation pump.

[0022] The beneficial effects of this utility model are as follows: By setting a receiving part in the sandwich structure and introducing fluid from the outside through the connecting hole and the communicating hole for circulation, this utility model can effectively remove impurities and other substances generated during the operation of the plunger, achieving effective cleaning and avoiding risks such as damage to the sealing ring and safety hazards; it can also improve the service life of the plunger pump and reduce damage to the plunger pump or equipment caused by leakage problems. Attached Figure Description

[0023] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0024] Figure 2 This is one of the structural schematic diagrams of this utility model;

[0025] Figure 3 This is one of the structural schematic diagrams of this utility model;

[0026] Figure 4 This is one of the structural schematic diagrams of this utility model;

[0027] Figure 5 This is one of the structural schematic diagrams of this utility model;

[0028] Figure 6 This is one of the structural schematic diagrams of this utility model;

[0029] In the figure: 1. Power unit; 11. Lead screw; 2. Housing; 21. First cavity; 22. Second cavity; 23. Opening; 231. Connecting hole; 3. Connecting part; 4. First plunger part; 41. Second plunger part; 5. Cavity-shaped end cap; 6. Control valve; 7. Sandwich structure; 71. First sealing part; 72. Second sealing part; 73. Receiving part; 74. Connecting hole. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] Example

[0032] like Figure 1-6 As shown, this embodiment provides a plunger pump with a cleaning structure, including a power unit 1, a housing 2, a plunger, a cavity-shaped end cap 5, and a sandwich structure 7 (i.e., a double-layer sealing ring sandwich structure), wherein the power unit 1 is connected to the housing 2 and forms a first cavity 21;

[0033] The plunger part includes a first plunger part 4 and a second plunger part 41, wherein the second plunger part 41 can penetrate the second cavity 22 on the housing part 2, and there is a partition between the second cavity 22 and the first cavity 21 to ensure the sealing effect between the cavities.

[0034] The second cavity 22 has a sandwich structure 7 inside, wherein the sandwich structure 7 has a receiving part 73 that communicates with the outside.

[0035] Specifically, the receiving part 73 has at least two connecting holes 74, wherein the connecting holes 74 connect the receiving part 73 with the connecting hole 231. More specifically, the connecting hole 231 is provided inside the housing part 2, wherein at least two are provided, corresponding to the connecting holes 74. The end of the connecting hole 231 is an opening 23 provided on the housing part 2. The two openings 23 and the connecting hole 231 are used to connect an external circulation pump. When external components such as peristaltic pumps continuously introduce and collect fluid to circulate in the receiving part 73, the impurities are cleaned, and the damage to the structure by hard crystals is avoided.

[0036] The sandwich structure 7 is also provided with a first sealing part 71 and a second sealing part 72. The first sealing part 71 is provided in the upper part of the sandwich structure 7, and the second sealing part 72 is provided in the lower part of the sandwich structure 7. Since the second plunger part 41 is continuously cleaned when it passes through the receiving part 73, it avoids impurities from damaging the sealing parts when it passes through the first sealing part 71 and the second sealing part 72.

[0037] A cavity-shaped end cap 5 is installed at the end of the housing part 2, and a control valve 6 may also be connected to the cavity-shaped end cap 5. The lead screw 11 at the end of the power part 1 is connected to the first plunger part 4 through the connecting part 3.

[0038] Specifically, this utility model provides a receiving part 73 within the sandwich structure 7, and introduces fluid from the outside for circulation through the connecting hole 231 and the communicating hole 74. This effectively removes impurities from the plunger during operation, achieving effective cleaning and avoiding risks such as damage to the sealing ring and safety hazards. It also improves the service life of the plunger pump and reduces damage to the plunger pump or equipment caused by leakage.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plunger pump with a cleaning structure, characterized in that, It includes a power unit (1), a housing unit (2), a plunger unit, a cavity-shaped end cap (5), and a sandwich structure (7), wherein, The power unit (1) is connected to the housing unit (2) and forms a first cavity (21). The plunger section includes a first plunger section (4) and a second plunger section (41), wherein, The second plunger portion (41) can penetrate the second cavity (22) on the housing portion (2), and there is a partition between the second cavity (22) and the first cavity (21); The second cavity (22) contains the sandwich structure (7), wherein, The sandwich structure (7) has a receiving part (73) that communicates with the outside.

2. A plunger pump with a cleaning structure according to claim 1, characterized in that, The receiving portion (73) has at least two connecting holes (74), wherein, The connecting hole (74) connects the receiving part (73) and the connecting hole (231).

3. A plunger pump with a cleaning structure according to claim 2, characterized in that, The connecting hole (231) is provided inside the housing part (2), wherein, At least two are provided, corresponding to the connecting hole (74).

4. A plunger pump with a cleaning structure according to claim 3, characterized in that, The end of the connecting hole (231) is an opening (23) provided on the housing part (2).

5. A plunger pump with a cleaning structure according to claim 1, characterized in that, The housing part (2) is equipped with a cavity-shaped end cap (5), and a control valve (6) may also be connected to the cavity-shaped end cap (5).

6. A plunger pump with a cleaning structure according to claim 1, characterized in that, The sandwich structure (7) is further provided with a first sealing part (71) and a second sealing part (72), wherein, The first sealing part (71) is disposed on the upper part of the sandwich structure (7), and the second sealing part (72) is disposed on the lower part of the sandwich structure (7).

7. A plunger pump with a cleaning structure according to claim 1, characterized in that, The lead screw (11) at the end of the power unit (1) is connected to the first plunger unit (4) via the connecting part (3).

8. A plunger pump with a cleaning structure according to claim 4, characterized in that, The two openings (23) and their connecting holes (231) are used to connect an external circulation pump.

Images