Double-phase stable peristaltic pump unit

Abstract

The utility model discloses a biphase stable type peristaltic pump unit which comprises a machine shell, a driver, a pump head and an elastic hose, the driver is arranged on the machine shell, the driver is connected with the pump head, the machine shell and the pump head are matched to extrude the elastic hose, the pump head is provided with a rotating shaft connected with the driver, and the rotating shaft is provided with a first rotating assembly and a second rotating assembly. The first rotating assembly is provided with a first extrusion roller, the second rotating assembly is provided with a second extrusion roller, and the first extrusion roller and the second extrusion roller alternately extrude the elastic hose to form phase difference; the pulse phenomenon that the first rotating assembly and the second rotating assembly extrude the elastic hose to output fluid is weakened to a certain degree through the phase difference, and the provided double-phase stable peristaltic pump unit can better achieve stable conveying of the fluid.

Description

Technical Field

[0001] The utility model relates to the technical field of peristaltic pumps, and in particular discloses a dual-phase stable peristaltic pump unit. Background Art

[0002] Peristaltic pump is a new type of fluid delivery pump after rotor pump, centrifugal pump, diaphragm pump, etc., which has been widely promoted and applied in various industries such as medical treatment, medicine, food, beverage, chemical industry, smelting, etc. When the peristaltic pump works, it relies on the guide wheel assembly to rotate in an arc or the pressure block assembly to squeeze the elastic hose in a serpentine straight line. The guide wheel assembly or the pressure block assembly requires more than two guide wheels or pressure blocks to squeeze the elastic hose to deliver the fluid.

[0003] After the fluid enters the peristaltic pump head, it is accumulated between the two guide wheels, forming a "fluid pillow", followed by a brief interruption of flow, because the rear section of the pump tube is blocked by the roller, forming a "fluid pillow" again. This cycle repeats, forming streams of fluid rather than a smooth and continuous flow. This phenomenon is called pulse. The pulse phenomenon will cause the continuity of the peristaltic pump to be unstable. The existing methods for solving the pulse phenomenon mainly include increasing the number of guide wheels and using a pulse suppressor. Increasing the number of guide wheels will reduce the fluid flow to a certain extent, and using a pulse suppressor cannot solve the pressure and flow limitations of the peristaltic pump itself. Therefore, it is necessary to propose a peristaltic pump to better achieve the stability of the peristaltic pump in conveying fluid. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a dual-phase stable peristaltic pump unit.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a dual-phase stable peristaltic pump unit, including a housing, a driver arranged on the housing, a pump head and an elastic hose, the driver is connected to the pump head, the housing and the pump head cooperate to extrude the elastic hose, the pump head has a rotating shaft connected to the driver, a first rotating assembly and a second rotating assembly are arranged on the rotating shaft, the first rotating assembly has a first squeezing roller, the second rotating assembly has a second squeezing roller, the first squeezing roller and the second squeezing roller alternately squeeze the elastic hose to form a phase difference. When the first squeezing roller squeezes the elastic hose, a certain first pulse flow will be formed, and when the second squeezing roller squeezes the elastic hose, a certain second pulse flow will be formed. The first squeezing roller and the second squeezing roller alternately squeeze the elastic hose, and the first pulse flow and the second pulse flow can correspond to different positions of a wavelength, and a phase difference is formed between the two. By setting the phase difference, the output first pulse flow and the output second pulse flow can be offset to a certain extent, and the fluid transported by the elastic hose can be made more stable.

[0006] Further, the first rotating assembly includes a first rotating member connected to the rotating shaft, a first support frame connected to the first rotating member, and a first guide wheel connected to the first support frame. The first pressing roller is disposed on the first support frame, and the first guide wheel has a first guiding groove for accommodating the elastic hose; the second rotating assembly includes a second rotating member connected to the rotating shaft, a second support frame connected to the second rotating member, and a second guide wheel connected to the second support frame. The second pressing roller is disposed on the second support frame, and the second guide wheel has a second guiding groove for accommodating the elastic hose. When the first pressing roller presses the elastic hose, the fluid in the elastic hose is squeezed to form a "fluid pillow", and the elastic hose deforms. The first guiding groove guides the deformation of the elastic hose to make the fluid flow in the elastic hose more continuous and stable.

[0007] Further, the first rotating member and the second rotating member are fixedly connected to the rotating shaft, the first support frame is fixedly connected to the first rotating member, the second support frame is fixedly connected to the second rotating member, the first pressing roller is rotatably connected to the first support frame, the first guide wheel is rotatably connected to the first support frame, the second pressing roller is rotatably connected to the second support frame, and the second guide wheel is rotatably connected to the second support frame. The support frame rolls against the elastic hose via the pressing roller; the guiding groove is annular and is arranged around the rotation axis of the guide wheel.

[0008] Further, the first rotating assembly and the second rotating assembly are arranged on the rotating shaft along the extending direction of the rotation axis of the rotating shaft, and the rotation axes of the first rotating assembly and the second rotating assembly are the same as the rotation axis of the rotating shaft.

[0009] Further, the number of the first pressing rollers, the number of the first guide wheels, the number of the second pressing rollers, and the number of the second guide wheels are each set to be multiple. The multiple first pressing rollers and the multiple first guide wheels are respectively arranged around the rotation axis of the first rotating assembly. There is one first guide wheel between two adjacent first pressing rollers, and there is one first pressing roller between two adjacent first guide wheels. The multiple second pressing rollers and the multiple second guide wheels are respectively arranged around the rotation axis of the second rotating assembly. There is one second guide wheel between two adjacent second pressing rollers, and there is one second pressing roller between two adjacent second guide wheels.

[0010] Further, the number of the first pressing rollers, the number of the first guide wheels, the number of the second pressing rollers, and the number of the second guide wheels are each set to be two. The connection direction of the two first pressing rollers and the connection direction of the two second pressing rollers are arranged in a crosswise manner. The connection direction of the two first pressing rollers and the connection direction of the two second pressing rollers are arranged perpendicularly.

[0011] Furthermore, the elastic hose includes a first hose for contacting the first rotating assembly and a second hose for contacting the second rotating assembly, and a joint is provided at the ends of the first hose and the second hose. The double hose arrangement enables the first rotating assembly to squeeze the first hose and the second rotating assembly to squeeze the second hose independently.

[0012] Furthermore, the casing is provided with a pump casing which is movably matched with the casing to facilitate replacement of the elastic hose. The pump casing has a pull-out piece for pulling out the pump casing. The casing has a fixing piece for fixing the pump casing, a rolling piece connected to the pump casing to facilitate pulling out the pump casing, and a rolling groove for accommodating the rolling piece.

[0013] Further, the driver is configured to drive a motor.

[0014] Furthermore, the bottom of the housing is provided with a plurality of shock absorbing members for pressing against the external bearing surface. The shock absorbing members can better ensure the stability of the peristaltic pump in the working state and reduce the vibration phenomenon on the external bearing surface.

[0015] After adopting the above structure, the advantages of the utility model compared with the prior art are: the first rotating component and the second rotating component rotate coaxially and in unison, and the connection direction of the two first squeezing rollers and the connection direction of the two second squeezing rollers are arranged vertically, so that the first pulse phenomenon of the first hose squeezed by the first rotating component to output the fluid and the second pulse phenomenon of the second hose squeezed by the second rotating component to output the fluid can be offset to a certain extent, the continuity of the elastic hose conveying the fluid is enhanced, and the pulse phenomenon generated by the peristaltic pump conveying the fluid can be better solved. The proposed dual-phase stable peristaltic pump unit can better achieve the stability of the peristaltic pump conveying the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is a first structural schematic diagram of a stable peristaltic pump unit of the utility model;

[0018] Figure 2 This is a second structural schematic diagram of a stable peristaltic pump unit of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model without the casing;

[0020] Figure 4 It is a schematic diagram of the structure of the utility model without the casing and the driver;

[0021] Figure 5 It is a structural schematic diagram of the connection between the pump head and the elastic hose of the utility model;

[0022] Figure 6 It is a schematic structural diagram of the pump head of the present utility model;

[0023] Figure 7 It is a schematic structural diagram of the pump head of the present utility model after removing the squeezing roller and the guide wheel;

[0024] Figure 8 It is a schematic exploded view of the connection between the housing and the pump housing of the present utility model.

[0025] Reference numerals include: 1, housing; 11, fixing member; 12, rolling member; 13, rolling groove; 14, shock-absorbing member; 15, frame; 16, cover; 161, air inlet slot; 162, air outlet hole; 163, cooling fan; 2, driver; 20, drive motor; 3, pump head; 31, rotating shaft; 32, first rotating assembly; 321, first rotating member; 322, first support frame; 323, first squeezing roller; 324, first guide wheel; 3241, first guiding groove; 33, second rotating assembly; 331, second rotating member; 332, second support frame; 333, second squeezing roller; 334, second guide wheel; 3341, second guiding groove; 4, elastic hose; 41, first hose; 42, second hose; 5, joint; 6, pump housing; 61, pulling member; 7, transparent plate. Detailed implementation manners

[0026] The following are only the preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly.

[0027] As Figures 1 to 8 shown, a dual-phase stable peristaltic pump unit provided by the present utility model includes a housing 1, a driver 2 provided on the housing 1, a pump head 3 and an elastic hose 4. The driver 2 is connected to the pump head 3, the housing 1 cooperates with the pump head 3 to squeeze the elastic hose 4. The pump head 3 has a rotating shaft 31 connected to the driver 2. The rotating shaft 31 is provided with a first rotating assembly 32 and a second rotating assembly 33. The first rotating assembly 32 has a first squeezing roller 323, and the second rotating assembly 33 has a second squeezing roller 333. The first squeezing roller 323 and the second squeezing roller 333 alternately squeeze the elastic hose 4 to form a phase difference.

[0028] In actual use, the driver 2 drives the rotating shaft 31 of the pump head 3 to rotate. The rotating shaft 31 drives the first rotating assembly 32 and the second rotating assembly 33 with different phases to respectively squeeze the elastic hose 4. When the first squeezing roller 323 squeezes the elastic hose 4, a certain first pulsating flow will be formed. When the second squeezing roller 333 squeezes the elastic hose 4, a certain second pulsating flow will be formed. The first squeezing roller 323 and the second squeezing roller 333 alternately squeeze the elastic hose 4. The first pulsating flow and the second pulsating flow can correspond to different positions of one wavelength. At this time, a phase difference is formed between the two. Due to the existence of the phase difference, the pulsation phenomenon of the elastic hose 4 conveying fluid is weakened to a certain extent, and the stability of the peristaltic pump for conveying fluid can be better realized.

[0029] Specifically, the first rotating assembly 32 includes a first rotating member 321 connected to the rotating shaft 31, a first support frame 322 connected to the first rotating member 321, and a first guide wheel 324 connected to the first support frame 322. The first squeezing roller 323 is arranged on the first support frame 322. The first guide wheel 324 has a first guiding groove 3241 for accommodating the elastic hose 4. The second rotating assembly 33 includes a second rotating member 331 connected to the rotating shaft 31, a second support frame 332 connected to the second rotating member 331, and a second guide wheel 334 connected to the second support frame 332. The second squeezing roller 333 is arranged on the second support frame 332. The second guide wheel 334 has a second guiding groove 3341 for accommodating the elastic hose 4.

[0030] In actual use, the rotating shaft 31 rotates. The rotating shaft 31 drives the first rotating member 321 and the second rotating member 331 connected thereto to rotate. The first rotating member 321 and the second rotating member 331 respectively drive the first support frame 322 and the second support frame 332 connected thereto to rotate. The first squeezing roller 323 and the first guide wheel 324 rotatably connected to the first support frame 322 rotate on the rotation axis of the rotating shaft 31 along with the first support frame 322. The second squeezing roller 333 and the second guide wheel 334 rotatably connected to the second support frame 332 rotate on the rotation axis of the rotating shaft 31 along with the second support frame 332.

[0031] Specifically, the first rotating member 321 and the second rotating member 331 are fixedly connected to the rotating shaft 31. The first support frame 322 is fixedly connected to the first rotating member 321. The second support frame 332 is fixedly connected to the second rotating member 331. The first squeezing roller 323 is rotatably connected to the first support frame 322. The first guide wheel 324 is rotatably connected to the first support frame 322. The second squeezing roller 333 is rotatably connected to the second support frame 332. The second guide wheel 334 is rotatably connected to the second support frame 332. The support frame rolls and abuts against the elastic hose 4 via the squeezing roller; the guiding groove is annular and is arranged around the rotation axis of the guide wheel.

[0032] Specifically, the first rotating assembly 32 and the second rotating assembly 33 are arranged on the rotating shaft 31 along the extension direction of the rotation axis of the rotating shaft 31, and the rotation axes of the first rotating assembly 32 and the second rotating assembly 33 are consistent with the rotation axis of the rotating shaft 31.

[0033] Specifically, the number of the first pressing rollers 323, the number of the first guide wheels 324, the number of the second pressing rollers 333, and the number of the second guide wheels 334 are set to be multiple. The multiple first pressing rollers 323 and the multiple first guide wheels 324 are respectively arranged around the rotation axis of the first rotating assembly 32. There is one first guide wheel 324 between two adjacent first pressing rollers 323, and there is one first pressing roller 323 between two adjacent first guide wheels 324. The multiple second pressing rollers 333 and the multiple second guide wheels 334 are respectively arranged around the rotation axis of the second rotating assembly 33. There is one second guide wheel 334 between two adjacent second pressing rollers 333, and there is one second pressing roller 333 between two adjacent second guide wheels 334.

[0034] Specifically, the number of the first pressing rollers 323, the number of the first guide wheels 324, the number of the second pressing rollers 333, and the number of the second guide wheels 334 are respectively set to be two. The connection directions of the two first pressing rollers 323 and the connection directions of the two second pressing rollers 333 are arranged in a cross manner.

[0035] During actual use, the connection directions of the two first pressing rollers 323 and the connection directions of the two second pressing rollers 333 are arranged perpendicular to each other.

[0036] Specifically, the elastic hose 4 includes a first hose 41 for abutting against the first rotating assembly 32 and a second hose 42 for abutting against the second rotating assembly 33. Connectors 5 are arranged at the ends of the first hose 41 and the second hose 42.

[0037] Specifically, a pump housing 6 that is movably matched with the machine housing 1 for facilitating the replacement of the elastic hose 4 is arranged on the machine housing 1. The pump housing 6 has a pulling member 61 for pulling the pump housing 6. The machine housing 1 has a fixing member 11 for fixing the pump housing 6, a rolling member 12 for connecting with the pump housing 6 to facilitate the pulling of the pump housing 6, and a rolling groove 13 for accommodating the rolling member 12.

[0038] During actual use, the elastic hose 4 is a consumable and needs to be frequently replaced. If the elastic hose 4 needs to be replaced, the fixing member 11 for fixing the pump housing 6 can be removed, and then the pulling member 61 on the pump housing 6 can be held and pulled. The pulling member 61 is of a handle structure. In this embodiment, the pulling member 61 is generally U-shaped. The pump housing 6 is pulled out under the action of the rolling member 12 and the rolling groove 13. Subsequently, the elastic hose 4 can be replaced. When installing the pump housing 6, the above steps can be reversed.

[0039] The pump housing 6 is generally U-shaped. The rolling member 12 is arranged on one side of the pump housing 6, and a detachable transparent plate 7 is provided on the other side of the pump housing 6. The transparent plate 7 is made of transparent plastic. During the process of the drive roller 2 driving the extrusion roller to extrude the elastic hose 4, the user can view the operating state through the transparent plate 7. At the same time, when the elastic hose 4 is temporarily damaged, the user can also see it through the transparent plate 7, which is convenient for the user to stop the peristaltic pump unit for maintenance.

[0040] Specifically, the drive 2 is set as a drive motor 20.

[0041] In actual use, the housing 1 includes a frame 15 and a housing 16 arranged around the frame 15. The drive motor 20 is installed on the frame 15 and located inside the housing 16. A plurality of air inlet slots are provided on one side wall of the housing 16, and an air outlet hole 162 is provided on the other side wall of the housing 16, and a cooling fan 163 matching the air outlet hole 162 is installed. During the actual use process of the dual-phase stable peristaltic pump unit, the cooling fan 163 drives the outside air into the housing 16 and flows out from the air outlet hole 162, so as to realize the heat dissipation of the drive motor 20.

[0042] Specifically, a plurality of shock-absorbing members 14 for pressing on the outside bearing surface are provided at the bottom of the housing 1.

[0043] In actual use, the entire dual-phase stable peristaltic pump unit is placed on the bearing surface (for example, the workbench surface of a table frame) by means of a plurality of shock-absorbing members 14. When the drive 2 operates, the shock-absorbing members 14 absorb the vibration impact transmitted from the dual-phase stable peristaltic pump unit to the bearing surface, and reduce the vibration generated by the dual-phase stable peristaltic pump unit during operation on the bearing surface.

[0044] In actual use, the output shaft of the driving motor 20 drives the rotating shaft 31 to rotate. The rotating shaft 31 drives the first rotating member 321 and the second rotating member 331 fixedly connected thereto to rotate. The first rotating member 321 and the second rotating member 331 respectively drive the first support frame 322 and the second support frame 332 fixedly connected thereto to rotate. The first support frame 322 drives the first pressing roller 323 and the first guide wheel 324 rotatably connected thereto to rotate along the rotation axis of the first rotating assembly 32. The second support frame 332 drives the second pressing roller 333 and the second guide wheel 334 rotatably connected thereto to rotate along the rotation axis of the second rotating assembly 33. The fluid in the first hose 41 squeezed by the first pressing roller 323 of the first rotating assembly 32 generates a certain first pulse phenomenon. The fluid in the second hose 42 squeezed by the second pressing roller 333 of the second rotating assembly 33 generates a certain second pulse phenomenon. The connection direction of the two first pressing rollers 323 and the connection direction of the two second pressing rollers 333 are arranged perpendicular to each other. The positions where the first pressing roller 323 squeezes the first hose 41 and the second pressing roller 333 squeezes the second hose 42 form a phase difference. The phase difference means that the first pulse phenomenon caused by the first pressing roller 323 squeezing the first hose 41 and the second pulse phenomenon caused by the second pressing roller 333 squeezing the second hose 42 can correspond to different positions of a wavelength. The existence of the phase difference causes a certain cancellation between the first pulse phenomenon and the second pulse phenomenon, thereby weakening the overall pulse phenomenon of the conveyed fluid. The weakening of the overall pulse phenomenon can better solve the stability of the peristaltic pump in conveying fluid.

[0045] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A dual-phase stable peristaltic pump unit, comprising a housing (1), a driver (2) arranged on the housing (1), a pump head (3) and an elastic hose (4), characterized in that: The driver (2) is connected to the pump head (3), the housing (1) and the pump head (3) cooperate to extrude the elastic hose (4), the pump head (3) has a rotating shaft (31) connected to the driver (2), a first rotating assembly (32) and a second rotating assembly (33) are provided on the rotating shaft (31), the first rotating assembly (32) has a first squeezing roller (323), the second rotating assembly (33) has a second squeezing roller (333), and the first squeezing roller (323) and the second squeezing roller (333) alternately squeeze the elastic hose (4) to form a phase difference.

2. A dual-phase stable peristaltic pump unit according to claim 1, characterized in that: The first rotating assembly (32) comprises a first rotating member (321) connected to the rotating shaft (31), a first supporting frame (322) connected to the first rotating member (321) and a first guide wheel (324) connected to the first supporting frame (322); the first squeezing roller (323) is arranged on the first supporting frame (322); the first guide wheel (324) has a first guide groove (3241) for accommodating the elastic hose (4); the second rotating assembly (33) comprises a second rotating member (331) connected to the rotating shaft (31), a second supporting frame (332) connected to the second rotating member (331) and a second guide wheel (334) connected to the second supporting frame (332); the second squeezing roller (333) is arranged on the second supporting frame (332); the second guide wheel (334) has a second guide groove (3341) for accommodating the elastic hose (4).

3. A dual-phase stable peristaltic pump unit according to claim 2, characterized in that: The first rotating member (321) and the second rotating member (331) are fixedly connected to the rotating shaft (31); the first support frame (322) is fixedly connected to the first rotating member (321); the second support frame (332) is fixedly connected to the second rotating member (331); the first squeezing roller (323) is rotatably connected to the first support frame (322); the first guide wheel (324) is rotatably connected to the first support frame (322); the second squeezing roller (333) is rotatably connected to the second support frame (332); the second guide wheel (334) is rotatably connected to the second support frame (332); the support frame rolls against the elastic hose (4) via the squeezing roller; the guide groove is annular and is arranged around the rotation axis of the guide wheel.

4. A dual-phase stable peristaltic pump unit according to claim 1, characterized in that: The first rotating assembly (32) and the second rotating assembly (33) are arranged on the rotating shaft (31) along the extension direction of the rotating axis of the rotating shaft (31), and the rotating axes of the first rotating assembly (32) and the second rotating assembly (33) are consistent with the rotating axis of the rotating shaft (31).

5. A dual-phase stable peristaltic pump unit according to claim 2, characterized in that: The number of first squeezing rollers (323), the number of first guide wheels (324), the number of second squeezing rollers (333) and the number of second guide wheels (334) are set to be multiple, and the multiple first squeezing rollers (323) and the multiple first guide wheels (324) are respectively arranged around the rotation axis of the first rotating component (32), there is a first guide wheel (324) between two adjacent first squeezing rollers (323), and there is a first squeezing roller (323) between two adjacent first guide wheels (324), and the multiple second squeezing rollers (333) and the multiple second guide wheels (334) are respectively arranged around the rotation axis of the second rotating component (33), there is a second guide wheel (334) between two adjacent second squeezing rollers (333), and there is a second squeezing roller (333) between two adjacent second guide wheels (334).

6. A dual-phase stable peristaltic pump unit according to claim 2, characterized in that: The number of first squeezing rollers (323), the number of first guide wheels (324), the number of second squeezing rollers (333) and the number of second guide wheels (334) are respectively set to two, and the connection direction of the two first squeezing rollers (323) and the connection direction of the two second squeezing rollers (333) are arranged crosswise.

7. A dual-phase stable peristaltic pump unit according to claim 1, characterized in that: The elastic hose (4) comprises a first hose (41) for contacting the first rotating assembly (32) and a second hose (42) for contacting the second rotating assembly (33). The ends of the first hose (41) and the second hose (42) are connected with a joint (5).

8. A dual-phase stable peristaltic pump unit according to claim 1, characterized in that: The casing (1) is provided with a pump casing (6) which is movably matched with the casing (1) to facilitate replacement of the elastic hose (4); the pump casing (6) has a drawer for drawing the pump casing (6); the casing (1) has a fixing member (11) for fixing the pump casing (6), a rolling member (12) connected to the pump casing (6) to facilitate drawing the pump casing (6), and a rolling groove (13) for accommodating the rolling member (12).

9. A dual-phase stable peristaltic pump unit according to claim 1, characterized in that: The driver (2) is configured to drive a motor (20).

10. The dual-phase stable peristaltic pump unit according to claim 1, characterized in that: The bottom of the casing (1) is provided with a plurality of shock absorbing parts (14) for pressing against an external bearing surface.

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