An infusion pump with easy-to-replace pipeline

Abstract

The present invention discloses an infusion pump with easily replaceable pipes. The pump comprises a first pump housing, a second pump housing, a locking member for locking the first and second pump housings together, an eccentric main shaft assembly disposed between the first and second pump housings and axially movable, and a wobble plate assembly mounted on the eccentric main shaft assembly. First and second pipe accommodating grooves for clamping elastic pipes are provided on opposing sides of the first and second pump housings, respectively. A first elastic member abuts against the first pump housing at one end of the eccentric main shaft assembly, while a second elastic member abuts against the second pump housing at the other end. The present invention has the advantages of a simple and reliable structure and easy pipe replacement.

Description

Technical Field

[0001] The invention relates to a liquid pump, in particular to an infusion pump with an easy-to-replace pipeline. Background Art

[0002] A pump is a machine that transports or pressurizes liquids. Pumps are widely used to transport liquids such as water, oil, acid and alkali solutions, emulsions, suspensions, and liquid metals. They can also transport liquid-gas mixtures and liquids containing suspended solids. Traditional pumps include centrifugal pumps, diaphragm pumps, piston pumps, and peristaltic pumps. In the chemical, food, pharmaceutical, and bioengineering industries, high requirements are placed on flow pulsation and flow accuracy. Patent document CN 110425121 A discloses a uniform flow pipeline pump, including a pump casing, a cylindrical inner cavity in the pump casing, an annular pipeline accommodating cavity is provided on the side wall of the cylindrical inner cavity, a pipeline inlet and outlet connected to the pipeline accommodating cavity is provided on the pump casing, a pipe joint fixed to the pump casing is provided outside the pipeline inlet and outlet, two elastic hoses are provided in the pipeline accommodating cavity, both ends of the elastic hoses are connected to the pipe joints, a main shaft coaxial with the inner cavity is provided in the inner cavity of the pump casing, the main shaft is connected to the motor, the pump casing is formed by the upper pump casing and the lower pump casing being matched and connected, an upper pipeline accommodating groove and a lower pipeline accommodating groove are provided on the opposite sides of the upper pump casing and the lower pump casing respectively, a plurality of protrusions are provided at equal intervals along the circumferential direction on the bottom of the upper pipeline accommodating groove and the lower pipeline accommodating groove, the upper pipeline accommodating groove and the lower pipeline accommodating groove are matched to form the above-mentioned pipeline accommodating cavity, and the main shaft is connected to the main shaft. The main shaft and sleeve are connected to a shaft. First and second wobble plates are mounted on the shaft and sleeve. The connecting portion of the main shaft and sleeve is tilted, allowing the first and second wobble plates to be mounted at an angle. The edges of the first and second wobble plates are provided with arcuate protrusions, which contact the inner sides of two elastic hoses, respectively. The first and second wobble plates are supported by first and second bearings. Opposite sides of the two wobble plates are provided with multiple bowl-shaped depressions spaced circumferentially. These depressions combine to form a plurality of nearly spherical ball cavities, each containing a rotatable ball. When the main shaft rotates, the first and second wobble plates swing circumferentially, periodically squeezing and releasing the elastic hoses during the swinging process, allowing liquid to be continuously discharged and drawn in. This technical solution helps reduce friction between the wobble plates and the pipes. Furthermore, the pipes are arranged symmetrically, with a 180° offset, ensuring uniform flow and smooth operation. Its disadvantage is that as the use time increases, the elastic hose will experience a decrease in elasticity, aging, and damage, so it must be replaced regularly. When replacing, the upper and lower pump shells must be completely disassembled, and the elastic hose must be reassembled after replacement, which is not convenient. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an infusion pump with a simple and reliable structure and easy pipe replacement.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An infusion pump with easy pipeline replacement includes a first pump casing, a second pump casing, a locking member for locking the first pump casing and the second pump casing, an eccentric main shaft assembly arranged between the first pump casing and the second pump casing and capable of axial movement, and a swing plate assembly installed on the eccentric main shaft assembly, wherein a first pipeline accommodating groove and a second pipeline accommodating groove for clamping an elastic pipeline are respectively provided on opposite sides of the first pump casing and the second pump casing, a first elastic member is abutted between one end of the eccentric main shaft assembly and the first pump casing, and a second elastic member is abutted between the other end of the eccentric main shaft assembly and the second pump casing.

[0006] As a further improvement of the above technical solution: a first stop portion and a second stop portion are provided on the eccentric main shaft assembly, a first support bearing is provided between the first pump housing and the eccentric main shaft assembly, and the first elastic member is disposed between the first stop portion and the inner ring of the first support bearing; a second support bearing is provided between the second pump housing and the eccentric main shaft assembly, and the second elastic member is disposed between the second stop portion and the inner ring of the second support bearing.

[0007] As a further improvement of the above technical solution: the eccentric main shaft assembly includes an eccentric main shaft and a sleeve detachably connected to the eccentric main shaft, the first stop portion is arranged on the outer periphery of the sleeve, and the second stop portion is arranged on the outer periphery of the eccentric main shaft.

[0008] As a further improvement of the above technical solution: the first elastic member and the second elastic member are both coil springs.

[0009] As a further improvement of the above technical solution: arc-shaped protrusions are provided on both sides of the wobble plate assembly, and a plurality of protrusions are evenly provided on the bottom of the first pipe accommodating groove and the second pipe accommodating groove along the circumferential direction.

[0010] As a further improvement of the above technical solution: the locking member is a screw.

[0011] As a further improvement of the above technical solution: an axial limiting portion is provided in the first pump housing, and the screw is provided with a clamping portion cooperating with the axial limiting portion, and a conical guiding portion located between the axial limiting portion and the clamping portion.

[0012] As a further improvement of the above technical solution: the axial limiting portion is provided with a retaining spring.

[0013] As a further improvement of the above technical solution: both the upper and lower ends of the screw are provided with step portions, and the diameter of the step portions is larger than the inner diameter of the retaining ring.

[0014] As a further improvement of the above technical solution: the first pipeline accommodating groove and the second pipeline accommodating groove are both annular grooves.

[0015] Compared with the prior art, the advantages of the present invention are: the infusion pump with easy-to-disassemble pipeline disclosed in the present invention has a first elastic member and a second elastic member respectively arranged between the two ends of the eccentric main shaft assembly and the first pump housing and the second pump housing. When the elastic pipeline needs to be replaced, the locking member is first removed. Under the elastic force of the first elastic member and the second elastic member, the axial spacing between the first pump housing, the second pump housing and the swing plate assembly is increased, and the elastic pipeline arranged in the first pipeline accommodating groove and the second pipeline accommodating groove is exposed, and the disassembly of the elastic pipeline is very convenient; when installing a new elastic pipeline, due to the large space between the first pipeline accommodating groove, the second pipeline accommodating groove and the swing plate assembly, the operation is also very convenient. After completing the replacement of the elastic pipeline, the elastic force of the first elastic member and the second elastic member is overcome, and the first pump housing and the second pump housing can be re-locked using the locking member. The structure is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the infusion pump with easy-to-replace pipeline of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the infusion pump with easy pipe replacement of the present invention after the upper and lower pump shells are separated.

[0018] Figure 3 It is a schematic cross-sectional view of the infusion pump with easy-to-replace pipeline according to the present invention.

[0019] Figure 4 The figure is a schematic cross-sectional view of the infusion pump with easy pipe replacement according to the present invention after the upper and lower pump shells are separated.

[0020] Figure 5 yes Figure 4 A partial enlarged view of .

[0021] The numbers in the figure represent: 1. First pump casing; 11. First pipe accommodating groove; 12. First support bearing; 13. Axial limiting portion; 14. Protrusion; 2. Second pump casing; 21. Second pipe accommodating groove; 22. Second support bearing; 3. Eccentric main shaft assembly; 31. First stop portion; 32. Second stop portion; 33. Eccentric main shaft; 34. Bushing; 35. Main shaft limiting spring; 4. Swing plate assembly; 41. Arc-shaped protrusion; 5. Elastic pipe; 61. First elastic member; 62. Second elastic member; 7. Locking member; 71. Clamping portion; 72. Conical guide portion; 73. Step portion; 8. Motor. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figures 1 to 5 An embodiment of an infusion pump with easily replaceable pipes according to the present invention is shown. The infusion pump with easily replaceable pipes according to this embodiment includes a first pump housing 1, a second pump housing 2, a locking member 7 for locking the first pump housing 1 and the second pump housing 2, an eccentric main shaft assembly 3 disposed between the first pump housing 1 and the second pump housing 2 and axially movable, and a wobble plate assembly 4 mounted on the eccentric main shaft assembly 3. A first pipe receiving groove 11 and a second pipe receiving groove 21 for clamping an elastic pipe 5 are respectively provided on opposite sides of the first pump housing 1 and the second pump housing 2. A first elastic member 61 is abutted between one end of the eccentric main shaft assembly 3 and the first pump housing 1, and a second elastic member 62 is abutted between the other end of the eccentric main shaft assembly 3 and the second pump housing 2. Preferably, the first pipe receiving groove 11 and the second pipe receiving groove 21 are both annular grooves.

[0024] The infusion pump with easy pipe replacement has a first elastic member 61 and a second elastic member 62 respectively disposed between the upper and lower ends of the eccentric main shaft assembly 3 and the first pump housing 1 and the second pump housing 2. When the elastic pipe 5 needs to be replaced, the locking member 7 is first removed. Under the elastic force of the first elastic member 61 and the second elastic member 62, the axial distance between the first pump housing 1, the second pump housing 2 and the swing plate assembly 4 is increased, and the elastic pipe 5 arranged in the first pipe accommodating groove 11 and the second pipe accommodating groove 21 is fully exposed. The elastic pipe 5 is very convenient to remove. When installing a new elastic pipe 5, the operation is also very convenient due to the large space between the first pipe accommodating groove 11, the second pipe accommodating groove 21 and the swing plate assembly 4. After completing the replacement of the elastic pipe 5, the elastic force of the first elastic member 61 and the second elastic member 62 is overcome, and the first pump housing 1 and the second pump housing 2 can be re-locked using the locking member 7. The structure is simple and reliable. In this embodiment, the first pump casing 1 is located above the second pump casing 2, and accordingly, the first elastic member 61 is arranged against the upper end of the first pump casing 1 and the eccentric main shaft assembly 3, and the second elastic member 62 is arranged against the lower end of the second pump casing 2 and the eccentric main shaft assembly 3; the first pipe accommodating groove 11 is arranged on the lower side of the first pump casing 1, and the second pipe accommodating groove 21 is arranged on the upper side of the second pump casing 2; preferably, the first elastic member 61 and the second elastic member 62 are both coil springs. Of course, in other embodiments, other forms can also be used as long as they can provide elastic force.

[0025] As a preferred technical solution, in this embodiment, a first stop portion 31 and a second stop portion 32 are provided on the eccentric main shaft assembly 3, and a first support bearing 12 is provided between the first pump housing 1 and the eccentric main shaft assembly 3. The first elastic member 61 is abutted between the first stop portion 31 and the inner ring of the first support bearing 12, that is, the first elastic member 61 pushes the first support bearing 12 and the upper pump housing 1 as a whole to rise through the inner ring of the first support bearing 12, so that the distance between the first pipe accommodating groove 11 and the wobble plate assembly 4 is increased; a second support bearing 22 is provided between the second pump housing 2 and the eccentric main shaft assembly 3, and the second elastic member 62 is abutted between the second stop portion 32 and the inner ring of the second support bearing 22, that is, the second elastic member 62 pushes the eccentric main shaft assembly 3, the wobble plate assembly 4, the first support bearing 12 and the first pump housing 1 as a whole to rise through the second stop portion 32, so that the distance between the second pipe accommodating groove 21 and the wobble plate assembly 4 is increased.

[0026] Preferably, a main shaft limiting retaining spring 35 can be provided at both the upper and lower ends of the eccentric main shaft assembly 3, and the main shaft limiting retaining spring 35 at the lower end cooperates with the inner ring of the second support bearing 22. When the main shaft limiting retaining spring 35 at the lower end contacts the inner ring of the second support bearing 22, the eccentric main shaft assembly 3 etc. rises to the maximum height; and the main shaft limiting retaining spring 35 at the upper end cooperates with the inner ring of the first support bearing 12. When the main shaft limiting retaining spring 35 at the upper end contacts the inner ring of the first support bearing 12, the first pump housing 1 etc. rises to the maximum height, which can prevent the eccentric main shaft assembly 3 from being completely separated from the first pump housing 1 and the second pump housing 2.

[0027] As a preferred technical solution, in this embodiment, the eccentric main shaft assembly 3 includes an eccentric main shaft 33 and a sleeve 34 detachably connected to the eccentric main shaft 33. A first stop 31 is provided on the outer periphery of the sleeve 34, and a second stop 32 is provided on the outer periphery of the eccentric main shaft 33. This structure allows for the assembly and disassembly of the first elastic member 61 and the second elastic member 62 after the first pump housing 1 and the second pump housing 2 are separated, and the sleeve 34 and the eccentric main shaft 33 are separated. The eccentric main shaft 33 and the sleeve 34 are preferably detachably connected via screws, ensuring a reliable connection and easy disassembly.

[0028] Furthermore, in this embodiment, arc-shaped protrusions 41 are provided on both sides of the wobble plate assembly 4, and multiple protrusions 14 are uniformly arranged along the circumference of the bottoms of the first and second pipe receiving grooves 11, 21. When the eccentric spindle assembly 3 rotates under the drive of the motor 8, it causes the wobble plate assembly 4 to oscillate circumferentially. This oscillation periodically squeezes and releases the elastic pipe 5, allowing liquid to be continuously discharged and drawn in. This helps reduce friction between the wobble plate assembly 4 and the elastic pipe 5. Furthermore, the elastic pipe 5 is symmetrically arranged vertically, with a 180° offset, ensuring uniform flow and smooth operation.

[0029] As a preferred technical solution, in this embodiment, the locking member 7 is a screw. The screw can reliably lock the first pump housing 1 and the second pump housing 2 into a whole, while also facilitating disassembly. Preferably, a handle is provided at the upper end of the screw to facilitate manual rotation of the screw.

[0030] Furthermore, in this embodiment, an axial stopper 13 is provided in the first pump housing 1, and the screw is provided with a clamping portion 71 that cooperates with the axial stopper 13, and a tapered guide portion 72 located between the axial stopper 13 and the clamping portion 71. When removing the locking member 7, the tapered guide portion 72 can be used to engage the clamping portion 71 with the axial stopper 13, thereby suspending the locking member 7 in the first pump housing 1 and preventing the locking member 7 from moving axially without having to completely remove the locking member 7, which is more convenient to use.

[0031] Furthermore, in this embodiment, the axial limiting portion 13 is provided with a retaining spring, that is, the retaining portion 71 on the screw is clamped by the retaining spring, which is simple and reliable. Of course, in other embodiments, the locking member 7 can also be suspended in the first pump housing 1 by using an interference fit between the axial limiting portion 13 and the retaining portion 71 or other means.

[0032] Furthermore, in this embodiment, the screw has stepped portions 73 at both ends, with a diameter greater than the inner diameter of the retaining ring. The stepped portion 73 at the upper end of the screw facilitates machining, while the stepped portion 73 at the lower end helps prevent the screw from being removed from the retaining ring, further improving reliability.

[0033] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. An infusion pump with an easy-to-replace pipeline, comprising a first pump housing (1), a second pump housing (2), a locking member (7) for locking the first pump housing (1) and the second pump housing (2), an eccentric main shaft assembly (3) disposed between the first pump housing (1) and the second pump housing (2) and capable of axial movement, and a wobble plate assembly (4) mounted on the eccentric main shaft assembly (3), wherein a first pipeline receiving groove (11) and a second pipeline receiving groove (21) for clamping an elastic pipeline (5) are respectively provided on opposite sides of the first pump housing (1) and the second pump housing (2), and characterized in that: A first elastic member (61) is provided between one end of the eccentric main shaft assembly (3) and the first pump housing (1), and a second elastic member (62) is provided between the other end of the eccentric main shaft assembly (3) and the second pump housing (2). Arc-shaped protrusions (41) are provided on both sides of the swing plate assembly (4), and a plurality of protrusions (14) are uniformly provided at the bottom of the first pipe accommodating groove (11) and the second pipe accommodating groove (21) along the circumferential direction. After the locking member (7) is disassembled, under the elastic force of the first elastic member (61) and the second elastic member (62), the axial distance between the first pump housing (1), the second pump housing (2) and the swing plate assembly (4) increases, and the elastic pipes (5) arranged in the first pipe accommodating groove (11) and the second pipe accommodating groove (21) are exposed, so that the replacement of the elastic pipes (5) is convenient.

2. The infusion pump with easy-to-replace tubing according to claim 1, characterized in that: The eccentric main shaft assembly (3) is provided with a first stop portion (31) and a second stop portion (32); a first support bearing (12) is provided between the first pump housing (1) and the eccentric main shaft assembly (3); the first elastic member (61) is disposed between the first stop portion (31) and the inner ring of the first support bearing (12); a second support bearing (22) is provided between the second pump housing (2) and the eccentric main shaft assembly (3); the second elastic member (62) is disposed between the second stop portion (32) and the inner ring of the second support bearing (22).

3. The infusion pump with easy-to-replace tubing according to claim 2, characterized in that: The eccentric main shaft assembly (3) comprises an eccentric main shaft (33) and a shaft sleeve (34) detachably connected to the eccentric main shaft (33); the first stop portion (31) is provided on the outer periphery of the shaft sleeve (34); and the second stop portion (32) is provided on the outer periphery of the eccentric main shaft (33).

4. The infusion pump with easy-to-replace tubing according to claim 1, characterized in that: The first elastic member (61) and the second elastic member (62) are both coil springs.

5. The infusion pump with easily replaceable tubing according to any one of claims 1 to 4, characterized in that: The locking member (7) is a screw.

6. The infusion pump with easy-to-replace tubing according to claim 5, characterized in that: An axial limiting portion (13) is provided in the first pump housing (1), and the screw is provided with a clamping portion (71) cooperating with the axial limiting portion (13), and a tapered guiding portion (72) located between the axial limiting portion (13) and the clamping portion (71).

7. The infusion pump with easy-to-replace tubing according to claim 6, characterized in that: The axial limiting portion (13) is provided with a clamping spring.

8. The infusion pump with easy-to-replace tubing according to claim 7, characterized in that: Both upper and lower ends of the screw are provided with step portions (73), and the diameter of the step portion (73) is larger than the inner diameter of the clamping spring.

9. The infusion pump with easily replaceable tubing according to any one of claims 1 to 4, characterized in that: The first pipe accommodating groove (11) and the second pipe accommodating groove (21) are both annular grooves.

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