Plunger pump with novel-structure pump head

Abstract

The utility model relates to the technical field of medical instruments, in particular to a plunger pump with a novel-structure pump head, which comprises a pump head body, a piston piece movably arranged in the pump head body and a liquid outlet arranged on the end face of the pump head body and communicated with the inside, and the liquid outlet is tangent to the inner wall of the pump head body and is used for sucking liquid into the pump head body and discharging the liquid into the pump head body. According to the plunger pump with the pump head of the new structure, the original liquid inlet right facing the liquid outlet is changed into the liquid inlet inclined to the liquid outlet pipe and tangent to the inner wall of the pump head body, so that the liquid inlet is formed in the pump head body, the liquid inlet is formed in the pump head body, the liquid inlet is formed in the pump head body, and the liquid inlet is formed in the pump head body. According to the plunger pump, the pump head body can move to the top, so that liquid entering the pump head body is changed into a vortex form under the pushing action, bubbles generated on the inner wall of the pump head body can be removed, the stability of the plunger pump is improved, the pump head body can move to the top, gas in the bubbles can be exhausted through the exhaust assembly, and the use precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a plunger pump with a novel pump head structure. Background Technology

[0002] A piston pump is a pump that uses the reciprocating motion of a piston within the working chamber of a hydraulic cylinder to cause periodic changes in the volume of the working chamber. Therefore, it is also called a reciprocating pump and is an important device in hydraulic systems.

[0003] Currently, as a common device, the core structure of a plunger pump typically consists of key components such as a stepper motor, lead screw assembly, pump body, piston rod, precision seals, and pump head. However, in practical applications, it is common for bubbles to remain inside the pump head and precipitate due to reagent replacement or prolonged lack of purging. When the plunger pump is running, these bubbles will enter the pump head through the connecting pipeline and adhere tightly to the inner wall of the pump head, making it difficult to remove them effectively.

[0004] When the pump is performing liquid extraction, the air bubbles on the inner wall of the pump head will continuously contract and expand with the dynamic changes in the internal pressure of the pump. This process greatly interferes with the pump's accurate sampling process, resulting in significant deviations in sampling accuracy. This deviation not only affects the performance stability of the plunger pump itself, but also has a significant impact on the overall performance of instruments and equipment that rely on its accurate sampling. Therefore, we propose a plunger pump with a new pump head structure. Utility Model Content

[0005] One of the technical problems to be solved in this application is: how to design a plunger pump with a new pump head structure that can reduce the reduction in accuracy caused by air bubbles on the inner wall of the pump head.

[0006] To address the aforementioned technical problems, this application provides a plunger pump with a novel pump head structure, comprising a pump head body, a piston movably disposed inside the pump head body, and a liquid outlet disposed on the end face of the pump head body and communicating with the interior, and further comprising:

[0007] The liquid inlet is located at the top of the pump head body. It is inclined on the pump head body and tangent to the inner wall of the pump head body. This allows the liquid to be drawn into the pump head body and generate a vortex to remove air bubbles.

[0008] An exhaust assembly is located on top of the pump head body and is used to automatically expel air bubbles after the piston generates a turbine motion inside the pump head body.

[0009] In some embodiments, a conical groove is formed inside the pump head body, and the exhaust assembly includes an iron ball movably disposed on the inner wall of the conical groove. A groove is formed on the inner wall of the pump head body, and the iron ball is movably disposed on the inner wall of the groove. The conical groove and the interior of the pump head body are connected through the groove.

[0010] In some embodiments, a connecting plate is movably disposed inside the conical groove, and a spring is disposed at the bottom end of the connecting plate, with the two ends of the spring respectively disposed at the bottom end of the connecting plate and the outer surface of the iron ball.

[0011] In some embodiments, the outer surface of the connecting disk is provided with three guide blocks, and the inner wall of the tapered groove is provided with three guide grooves, with the three guide blocks respectively movably disposed on the inner wall of the corresponding guide groove.

[0012] In some embodiments, the top of the pump head body is provided with a placement groove, the bottom end of the placement groove is provided with a threaded groove that communicates with each other, the threaded groove is connected to the conical groove, the inner wall of the threaded groove is threaded with a screw, the bottom end of the screw is movably provided with a linkage rod, and the bottom end of the linkage rod is slidably provided on the top of the connecting plate.

[0013] In some embodiments, the top end of the screw is provided with a plum blossom groove plate, which is movably disposed on the inner wall of the placement groove, and the top end of the plum blossom groove plate is provided with a plurality of vent holes communicating with the placement groove.

[0014] In some embodiments, a flow divider is provided at the connection between the inner wall of the inlet and the inside of the pump head body.

[0015] This utility model has at least the following beneficial effects:

[0016] 1. By replacing the original inlet that faces the outlet with an inlet that is inclined to the outlet pipe and tangent to the inner wall of the pump head, the incoming liquid is made into a vortex under the pushing action, which can remove the air bubbles generated on the inner wall of the pump head and increase the stability of the plunger pump.

[0017] 2. The exhaust component is designed to move away from the inner wall of the pump head body during the bubble removal process. It will then move upwards and expel the gas from the bubbles through the exhaust component, increasing the accuracy of use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the side of the pump head body of this utility model.

[0020] Figure 3 for Figure 2 A magnified structural diagram at point A;

[0021] Figure 4 This is a schematic diagram of the structure of the exhaust assembly of this utility model;

[0022] Figure 5 This is a schematic cross-sectional view of the front of the pump head body of this utility model.

[0023] Figure 6 for Figure 5 A magnified structural diagram at point B.

[0024] In the diagram: 1. Pump head body; 2. Liquid inlet; 3. Piston; 4. Exhaust assembly; 41. Placement groove; 42. Threaded groove; 43. Groove; 44. Iron ball; 45. Conical groove; 46. Linkage rod; 47. Guide groove; 48. Spring; 49. Connecting plate; 410. Guide block; 411. Screw; 412. Plum blossom groove plate; 413. Exhaust hole; 5. Liquid outlet; 6. Diverter plate. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Example 1: Please refer to Figure 1-4 This utility model provides a technical solution: a plunger pump with a novel pump head structure, comprising a pump head body 1, a piston 3 movably disposed inside the pump head body 1, and a liquid outlet 5 disposed on the end face and inside the pump head body 1, and further comprising:

[0027] Liquid inlet 2 is located at the top of the pump head body 1. It is inclined on the pump head body 1 and tangent to the inner wall of the pump head body 1. It is used to draw liquid into the pump head body 1 and generate a vortex to remove air bubbles. Because the original liquid inlet is set directly opposite the liquid outlet 5, it is difficult to remove the generated air bubbles.

[0028] Exhaust assembly 4 is located on the top of pump head body 1. It is used to automatically discharge air bubbles after the piston 3 generates turbine motion inside the pump head body 1.

[0029] The pump head body 1 has a conical groove 45 inside. The exhaust assembly 4 includes an iron ball 44 that is movably disposed on the inner wall of the conical groove 45. The inner wall of the pump head body 1 has a groove 43. The iron ball 44 is movably disposed on the inner wall of the groove 43. The conical groove 45 and the interior of the pump head body 1 are connected through the groove 43. The groove 43 can entrain the gas inside the pump head body 1 into the liquid. At this time, the gas will enter the groove 43 from the water. The iron ball 44 can prevent gas leakage.

[0030] A connecting plate 49 is movably arranged inside the conical groove 45. A spring 48 is provided at the bottom of the connecting plate 49. The two ends of the spring 48 are respectively located at the bottom of the connecting plate 49 and the outer surface of the iron ball 44. The iron ball 44 can reciprocate by being squeezed by the spring 48, which can generate gas from the air bubbles and expel them.

[0031] The outer surface of the connecting plate 49 is provided with three guide blocks 410, and the inner wall of the tapered groove 45 is provided with three guide grooves 47. The three guide blocks 410 are respectively movably disposed on the inner wall of the corresponding guide grooves 47. The purpose of the guide blocks 410 and the guides is to guide the connecting plate 49.

[0032] The top of the pump head body 1 is provided with a placement groove 41, and the bottom end of the placement groove 41 is provided with a threaded groove 42 that is connected to each other. The threaded groove 42 is connected to the conical groove 45. The inner wall of the threaded groove 42 is threadedly connected with a screw 411. The bottom end of the screw 411 is movably provided with a linkage rod 46. The bottom end of the linkage rod 46 is slidably provided on the top end of the connecting plate 49. The screw 411 can compress the spring 48 through the linkage rod 46, so that the iron ball 44 generated by the change of air pressure inside the pump head body 1 can be controlled to open in advance.

[0033] The top of the screw 411 is provided with a plum blossom groove plate 412, which is movably disposed on the inner wall of the placement groove 41. The top of the plum blossom groove plate 412 is provided with multiple vent holes 413 that are connected to the placement groove 41. The vent holes 413 are for quickly expelling the gas blocked by the plum blossom groove plate 412.

[0034] When using this device, the liquid is first introduced into the pump head body 1 through the inlet 2. At the same time, the piston 3 is activated to squeeze the inside of the pump head body 1, which generates a turbine that draws air bubbles from the inner wall of the pump head body 1 into the liquid. The air bubbles then move upward from the liquid and accumulate inside the groove 43. During the movement of the piston 3, the iron ball 44 is squeezed, and the iron ball 44 squeezes the spring 48. Since the iron ball 44 is movably located inside the conical groove 45, the gas inside the groove 43 can be discharged through the conical groove 45. If the liquid pressure is too high and there is concern that the iron ball 44 may be pushed open, the plum blossom groove plate 412 can be rotated to drive the screw 411 to rotate inside the threaded groove 42, which can drive the linkage rod 46 and the connecting plate 49 to move, compressing the length of the spring 48, increasing the force on the iron ball 44, and improving the pressure resistance.

[0035] Example 2: Please refer to Figure 5 and 6 This utility model provides a technical solution: a flow divider 6 is provided at the connection between the inner wall of the liquid inlet 2 and the inside of the pump head body 1. The flow divider 6 generates a flow divider effect before the liquid enters the pump head body 1, which can increase the ability of the vortex to entangle the bubbles.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present utility have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present utility.

Claims

1. A plunger pump with a novel pump head structure, comprising a pump head body (1), a piston (3) movably disposed inside the pump head body (1), and a liquid outlet (5) disposed on the end face and communicating with the interior of the pump head body (1), characterized in that: It also includes: Liquid inlet (2) is located at the top of the pump head body (1), and is inclined on the pump head body (1) and tangent to the inner wall of the pump head body (1) so as to draw liquid into the pump head body (1) and generate a vortex to remove air bubbles. The exhaust assembly (4) is located on the top of the pump head body (1) and is used to automatically discharge air bubbles after the piston (3) generates turbine motion inside the pump head body (1).

2. The plunger pump with the novel pump head structure according to claim 1, characterized in that: The pump head body (1) has a conical groove (45) inside. The exhaust assembly (4) includes an iron ball (44) that is movably disposed on the inner wall of the conical groove (45). The pump head body (1) has a groove (43) on its inner wall. The iron ball (44) is movably disposed on the inner wall of the groove (43). The conical groove (45) and the interior of the pump head body (1) are connected through the groove (43).

3. The plunger pump with the novel pump head structure according to claim 2, characterized in that: A connecting plate (49) is movably arranged inside the conical groove (45). A spring (48) is provided at the bottom end of the connecting plate (49). The two ends of the spring (48) are respectively located at the bottom end of the connecting plate (49) and the outer surface of the iron ball (44).

4. The plunger pump with the novel pump head structure according to claim 3, characterized in that: The outer surface of the connecting plate (49) is provided with three guide blocks (410), and the inner wall of the conical groove (45) is provided with three guide grooves (47). The three guide blocks (410) are respectively movably disposed on the inner wall of the corresponding guide grooves (47).

5. The plunger pump with the novel pump head structure according to claim 4, characterized in that: The pump head body (1) has a placement groove (41) on its top and a threaded groove (42) that is interconnected at the bottom of the placement groove (41). The threaded groove (42) is connected to the conical groove (45). A screw (411) is threadedly connected to the inner wall of the threaded groove (42). A linkage rod (46) is movably provided at the bottom of the screw (411). The bottom of the linkage rod (46) is slidably provided at the top of the connecting plate (49).

6. The plunger pump with the novel pump head structure according to claim 5, characterized in that: The top end of the screw (411) is provided with a plum blossom groove plate (412), which is movably disposed on the inner wall of the placement groove (41). The top end of the plum blossom groove plate (412) is provided with a plurality of vent holes (413) that are connected to the placement groove (41).

7. The plunger pump with the novel pump head structure according to claim 1, characterized in that: A flow divider (6) is provided at the connection between the inner wall of the inlet (2) and the inside of the pump head body (1).

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