阅读说明：本技术 一种输液泵装置 (Infusion pump device ) 是由 肖立峰 陈洪伟 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种输液泵装置,包括泵壳,所述泵壳内设有活塞缸、管道容置腔、用于连通活塞缸和管道容置腔的导流结构、摆盘、以及用于驱动摆盘圆周摆动的旋转轴,所述活塞缸内设有活塞杆,所述管道容置腔内设有弹性管道,所述导流结构内设有用于传递压力的工作介质,所述活塞杆与所述摆盘抵接并配设有弹性复位件。本发明具有结构紧凑、有利于避免液体被污染、延长使用寿命等优点。(The invention discloses an infusion pump device which comprises a pump shell, wherein a piston cylinder, a pipeline accommodating cavity, a flow guide structure, a swinging plate and a rotating shaft are arranged in the pump shell, the flow guide structure is used for communicating the piston cylinder with the pipeline accommodating cavity, the rotating shaft is used for driving the swinging plate to swing circumferentially, a piston rod is arranged in the piston cylinder, an elastic pipeline is arranged in the pipeline accommodating cavity, a working medium used for transmitting pressure is arranged in the flow guide structure, and the piston rod is abutted against the swinging plate and is provided with an elastic reset piece. The invention has the advantages of compact structure, contribution to avoiding liquid pollution, prolonged service life and the like.)

1. An infusion pump device comprising a pump housing (1), characterized in that: be equipped with piston cylinder (11), pipeline holding chamber (15), be used for the water conservancy diversion structure, the balance (3) of intercommunication piston cylinder (11) and pipeline holding chamber (15) and be used for driving balance (3) circumference wobbling rotation axis (4) in pump case (1), be equipped with piston rod (5) in piston cylinder (11), be equipped with elasticity pipeline (2) in pipeline holding chamber (15), be equipped with the working medium who is used for transmission pressure in the water conservancy diversion structure, piston rod (5) with balance (3) butt and set elasticity piece (51) that resets.

2. The infusion pump device according to claim 1, wherein: the piston rod (5) is provided with a first ball containing groove (53), the wobble plate (3) is provided with a second ball containing groove (31), and a ball (52) is arranged between the first ball containing groove (53) and the second ball containing groove (31).

3. The infusion pump device according to claim 2, wherein: the first ball receiving groove (53) and the second ball receiving groove (31) are in point contact with the ball (52) with a gap between the periphery of the contact point and the ball (52).

4. The infusion pump device according to claim 2, wherein: the flow guide structure comprises a flow guide hole (12), a flow guide groove (13) connected with the flow guide hole (12) is formed in the side edge of the elastic pipeline (2) along the length direction, and the working medium is arranged in the flow guide hole (12) and the flow guide groove (13).

5. The infusion pump device according to claim 2, wherein: the piston cylinders (11) are arranged in a plurality and are uniformly arranged along the circumferential direction of the rotating shaft (4), and the pipeline accommodating cavities (15) are arranged in a plurality and are in one-to-one correspondence with the piston cylinders (11).

6. The infusion pump device according to claim 5, wherein: the liquid inlet of each elastic pipeline (2) is connected with the liquid inlet converging seat (61) through a liquid inlet one-way valve (63), and the liquid outlet of each elastic pipeline (2) is connected with the liquid outlet converging seat (62) through a liquid outlet one-way valve (64).

7. The infusion pump device according to claim 6, wherein: the number of the piston cylinders (11) and the number of the pipeline accommodating cavities (15) are four.

8. The infusion pump device according to claim 7, wherein: the elastic pipelines (2) in the four pipeline accommodating cavities (15) are arranged in a pairwise crossing manner.

9. The infusion pump device according to claim 1, wherein: be equipped with first spacing portion (54) on piston rod (5), be equipped with spacing portion of second (14) on pump case (1), elasticity resets piece (51) and is located for coil spring and cover piston rod (5) periphery, coil spring one end with first spacing portion (54) butt, the coil spring other end with spacing portion of second (14) butt.

10. The infusion pump device according to any one of claims 1 to 9, wherein: the included angle between the central line of the swinging disc (3) and the central line of the rotating shaft (4) is beta, beta is more than 0 degree and less than 90 degrees, the rotating shaft (4) is provided with an extrusion part (41) used for extruding the swinging disc (3), a first thrust bearing (71) is arranged between one side of the extrusion part (41) and the pump shell (1), and a second thrust bearing (72) is arranged between the other side, opposite to the extrusion part (41), of the extrusion part and the swinging disc (3).

Technical Field

The invention relates to pumping equipment, in particular to an infusion pump device.

Background

At present, in the field of liquid pumping, when liquid needs to have high pressure, a plunger pump is generally adopted, but when the plunger pump is used, the liquid is contacted with a plunger, and foreign matters are easily generated due to friction between the plunger and a cylinder body, so that the liquid is polluted, and therefore, the plunger pump is not suitable for the condition that the requirement on cleanliness of food, medicines and the like is very high. The diaphragm of the high-pressure diaphragm pump has short service life and high price, so that the use cost is increased, and the volume of the diaphragm pump is increased in order to enable the diaphragm to bear high pressure.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the infusion pump device which has a compact structure, is beneficial to avoiding liquid pollution and prolongs the service life.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides an infusion pump device, includes the pump case, be equipped with piston cylinder, pipeline holding chamber in the pump case, be used for the water conservancy diversion structure, the balance that communicate piston cylinder and pipeline holding chamber and be used for driving balance circumference wobbling rotation axis, be equipped with the piston rod in the piston cylinder, pipeline holding intracavity is equipped with the elasticity pipeline, be equipped with the working medium that is used for transmitting pressure in the water conservancy diversion structure, the piston rod with the balance butt sets the elasticity piece that resets.

As a further improvement of the above technical solution: the piston rod is provided with a first ball containing groove, the wobble plate is provided with a second ball containing groove, and balls are arranged between the first ball containing groove and the second ball containing groove.

As a further improvement of the above technical solution: the first ball accommodating groove and the second ball accommodating groove are in point contact with the balls, and gaps are formed between the peripheries of the contact points and the balls.

As a further improvement of the above technical solution: the flow guide structure comprises a flow guide hole, a flow guide groove connected with the flow guide hole is formed in the length direction of the side edge of the elastic pipeline, and the working medium is arranged in the flow guide hole and the flow guide groove.

As a further improvement of the above technical solution: the piston cylinder is provided with a plurality of piston cylinders and is uniformly arranged along the circumferential direction of the rotating shaft, and the pipeline accommodating cavity is provided with a plurality of piston cylinders and is arranged in one-to-one correspondence with the piston cylinders.

As a further improvement of the above technical solution: the infusion pump device further comprises a liquid inlet converging seat and a liquid outlet converging seat, liquid inlets of the elastic pipelines are respectively connected with the liquid inlet converging seat through a liquid inlet one-way valve, and liquid outlets of the elastic pipelines are respectively connected with the liquid outlet converging seat through a liquid outlet one-way valve.

As a further improvement of the above technical solution: the piston cylinder with the quantity of pipeline holding chamber is four.

As a further improvement of the above technical solution: the elastic pipelines in the four pipeline accommodating cavities are arranged in a pairwise crossing manner.

As a further improvement of the above technical solution: the piston rod is provided with a first limiting part, the pump shell is provided with a second limiting part, the elastic reset piece is a spiral spring and is sleeved on the periphery of the piston rod, one end of the spiral spring is abutted against the first limiting part, and the other end of the spiral spring is abutted against the second limiting part.

As a further improvement of the above technical solution: the included angle between the central line of the swinging disc and the central line of the rotating shaft is beta, beta is more than 0 degree and less than 90 degrees, the rotating shaft is provided with an extrusion part for extruding the swinging disc, a first thrust bearing is arranged between one side of the extrusion part and the pump shell, and a second thrust bearing is arranged between the other side, opposite to the extrusion part, of the extrusion part and the swinging disc.

Compared with the prior art, the invention has the advantages that: when the infusion pump device disclosed by the invention works, the rotating shaft rotates to further drive the swinging disc to circularly swing, the swinging disc periodically extrudes the piston rod by overcoming the elasticity of the elastic resetting piece during swinging, the piston rod can reset under the elastic action of the elastic resetting piece to enable the piston rod to reciprocate in the piston cylinder, and further, a working medium in the flow guide structure is driven to periodically extrude and loosen the elastic pipeline, so that the volume in the elastic pipeline is periodically changed, and liquid is continuously sucked and discharged. Because the piston rod is not contacted with the liquid in the elastic pipeline, the problem that the liquid in the elastic pipeline is polluted is effectively avoided. When the pressure of the liquid in the elastic pipeline is very high, the pressure of the working medium can offset the pressure of the liquid in a part of the elastic pipeline, so that the pressure applied to the inner wall and the outer wall of the elastic pipeline is basically consistent, the compression deformation of the elastic pipeline can be greatly reduced, and the service life of the elastic pipeline can be prolonged.

Drawings

Fig. 1 is a schematic view of the structure of an infusion pump device of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is an exploded view of the infusion pump device of the present invention.

Fig. 4 is a schematic structural view of the guide grooves in the present invention.

Fig. 5 is a schematic diagram of the structure of four flexible tubes in the present invention.

Fig. 6 is a flow-phase diagram of four flexible tubes in accordance with the present invention.

Fig. 7 is a schematic flow-phase diagram of four elastic pipes in the invention after confluence.

The reference numerals in the figures denote: 1. a pump housing; 11. a piston cylinder; 12. a flow guide hole; 13. a diversion trench; 14. a second limiting part; 15. a conduit accommodating chamber; 2. an elastic conduit; 3. placing a plate; 31. a second ball receiving recess; 4. a rotating shaft; 41. a pressing section; 42. a drive motor; 5. a piston rod; 51. an elastic reset member; 52. a ball bearing; 53. a first ball receiving recess; 54. a first limiting part; 61. a liquid inlet converging seat; 62. a liquid outlet confluence seat; 63. a liquid inlet check valve; 64. a liquid outlet one-way valve; 71. a first thrust bearing; 72. a second thrust bearing.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

Fig. 1 to 7 show an embodiment of an infusion pump device according to the present invention, which includes a pump case 1, a piston cylinder 11, a pipeline accommodating cavity 15, a flow guide structure for communicating the piston cylinder 11 and the pipeline accommodating cavity 15, a wobble plate 3, and a rotating shaft 4 for driving the wobble plate 3 to circumferentially swing are disposed in the pump case 1, a piston rod 5 is disposed in the piston cylinder 11, an elastic pipeline 2 is disposed in the pipeline accommodating cavity 15, a working medium (such as a filling pattern in the piston cylinder 11 and the flow guide hole 12 in fig. 1, which may be a common hydraulic oil or the like) for transmitting pressure is disposed in the flow guide structure, and the piston rod 5 abuts against the wobble plate 3 and is provided with an elastic restoring member 51. In this embodiment, the piston cylinder 11 is arranged in the up-down direction, the wobble plate 3 is located above the piston rod 5, the pipeline accommodating cavity 15 is located below the piston cylinder 11, and the upper end of the rotating shaft 4 is connected with the driving motor 42 to realize rotation. Of course, in other embodiments, the relative positional relationship between the members and the driving force of the rotary shaft 4 may be appropriately adjusted.

The infusion pump device is characterized in that when the infusion pump device works, the rotating shaft 4 rotates, the swinging disc 3 is driven to swing circumferentially (the swinging disc 3 does not rotate along with the rotating shaft 4), the swinging disc 3 overcomes the elasticity of the elastic resetting piece 51 to extrude the piston rod 5 periodically, the piston rod 5 can reset under the elastic action of the elastic resetting piece 51, the piston rod 5 can move back and forth (move up and down in the embodiment) in the piston cylinder 11, and then the working medium in the flow guide structure can extrude and relax the elastic pipeline 2 periodically, so that the volume of the elastic pipeline 2 changes periodically, liquid is sucked and discharged continuously, preferably, the working medium is also arranged in the piston cylinder 11, and the elastic pipeline 2 can be extruded more effectively and quickly. The infusion pump device has compact integral structure and small volume, and effectively avoids the problem that the liquid in the elastic pipeline 2 is polluted because the piston rod 5 is not contacted with the liquid in the elastic pipeline 2. When the pressure of the liquid in the elastic pipeline 2 is very high, the pressure of the liquid in a part of the elastic pipeline 2 can be offset by the pressure of the working medium, so that the pressure applied to the inner wall and the outer wall of the elastic pipeline 2 is basically consistent, the compression deformation of the elastic pipeline 2 can be greatly reduced, and the service life of the elastic pipeline 2 can be prolonged.

Further, in the present embodiment, the piston rod 5 is provided with a first ball receiving groove 53, the wobble plate 3 is provided with a second ball receiving groove 31, and a ball 52 is disposed between the first ball receiving groove 53 and the second ball receiving groove 31. The balls 52 move up and down along with the piston rod 5 under the extrusion action of the wobble plate 3, and roll in the first ball accommodating groove 53 and the second ball accommodating groove 31, so that the pump runs more stably and smoothly, and the transmission efficiency is higher.

Furthermore, referring to fig. 2, the first ball receiving groove 53 and the second ball receiving groove 31 are in point contact with the balls 52, specifically, the bottom of the first ball receiving groove 53 and the top of the second ball receiving groove 31 are in contact with the balls 52, and a gap is formed between the periphery of the contact point and the balls 52, so that the balls 52 can move more flexibly and smoothly when being pressed by the wobble plate 3.

As the preferred embodiment, the flow guiding structure includes the flow guiding hole 12, the side of the elastic pipeline 2 has the flow guiding slot 13 connected with the flow guiding hole 12 along the length direction, the flow guiding hole 12 and the flow guiding slot 13 are all equipped with working medium, when the piston rod 5 moves up and down, the working medium periodically extrudes the elastic pipeline 2 through the flow guiding hole 12 and the flow guiding slot 13, continuously sucks liquid and discharges liquid, the structure is simple and reliable.

Further, the piston cylinders 11 are provided in plurality and are uniformly arranged along the circumferential direction of the rotating shaft 4, and the pipe accommodating chamber 15 is provided in plurality and is arranged in one-to-one correspondence with the plurality of piston cylinders 11. Through evenly distributed a plurality of piston cylinders 11 and supporting piston rod 5, pipeline holding chamber 15 and elastic conduit 2 along the circumferencial direction, every rotation of rotation axis 4, each piston rod 5 is extruded in proper order to wobble plate 3 to the flow pulse of output corresponding quantity. Referring to fig. 6 and 7, the larger the number of piston rods 5 and flexible tubes 2, the more continuous (or shorter flow pulse intervals) and uniform (or smaller differences between the peaks and troughs of the flow pulses) the output flow of the pump.

Further, in this embodiment, the infusion pump device further includes a liquid inlet converging seat 61 and a liquid outlet converging seat 62, a liquid inlet of each elastic tube 2 is connected to the liquid inlet converging seat 61 through a liquid inlet one-way valve 63, and a liquid outlet of each elastic tube 2 is connected to the liquid outlet converging seat 62 through a liquid outlet one-way valve 64. When the elastic pipeline works, when the pressure of working media on the outer wall of one elastic pipeline 2 is reduced, the corresponding liquid inlet one-way valve 63 is opened, liquid in the liquid inlet confluence seat 61 enters the elastic pipeline 2 through the liquid inlet one-way valve 63, and then the liquid inlet one-way valve 63 is closed; when the pressure of the working medium on the outer wall of the elastic pipeline 2 is increased, the liquid in the elastic pipeline 2 enters the liquid outlet confluence seat 62 through the liquid outlet one-way valve 64, and then the liquid outlet one-way valve 64 is closed, so that the circulation is realized, and the structure is simple and reliable.

As a preferred embodiment, the number of the piston cylinder 11 and the pipe accommodating cavity 15 is four, the four piston rods 5 are equally divided by 360 °, that is, the included angle between two adjacent piston rods 5 is 90 °, the phase difference of the flow pulses generated by the two corresponding elastic pipes 2 is 90 °, the flow generated by the four elastic pipes 2 is converged at the liquid outlet converging seat 62, and more continuous and uniform flow can be output.

Further, in this embodiment, two liang of crossing arrangements of the elastic pipeline 2 in the four pipeline holding chamber 15 for the holistic atress of four elastic pipeline 2 is more balanced, and the pump operation is more steady.

In a preferred embodiment, the piston rod 5 is provided with a first stopper 54, the pump housing 1 is provided with a second stopper 14, the elastic return member 51 is a coil spring and is fitted around the outer periphery of the piston rod 5, one end of the coil spring abuts against the first stopper 54, and the other end of the coil spring abuts against the second stopper 14. The first and second position-limiting portions 54 and 14 may have a stepped structure, for example, which is simple and reliable.

Furthermore, the included angle between the center line of the wobble plate 3 and the center line of the rotating shaft 4 is β, β is more than 0 degree and less than 90 degrees, β is 10 degrees in the embodiment, the rotating shaft 4 is provided with a pressing part 41 for pressing the wobble plate 3, a first thrust bearing 71 is arranged between one side of the pressing part 41 and the pump housing 1, and a second thrust bearing 72 is arranged between the other side of the pressing part 41 opposite to the wobble plate 3. When the piston type cylinder machine works, the driving motor 42 drives the rotating shaft 4 to rotate, the extrusion part 41 rotates along with the rotating shaft 4 and extrudes the swinging disk 3, the swinging disk 3 only does circumferential swinging without rotating along with the rotating shaft 4 under the action of the first thrust bearing 71 and the second thrust bearing 72, and the swinging disk 3 sequentially extrudes the piston rods 5 when swinging.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.