High-reliability peristaltic pump

Abstract

The utility model provides a high-reliability peristaltic pump. The high-reliability peristaltic pump comprises a driving mechanism, a pump cover, a roller assembly and a hose. The pump cover is fixedly connected with the driving mechanism, the roller assembly is rotationally arranged in the pump cover, the hose is arranged between the peripheral side face of the roller assembly and the inner wall face of the pump cover in an extruded mode, the two ends of the hose are connected with the input connector and the output connector respectively, and the input connector is axially fixed and limited between the pump cover and the driving mechanism. The axial direction of the output connector is movably limited between the pump cover and the driving mechanism. According to the high-reliability peristaltic pump, the axial direction of the input connector is fixedly limited between the pump cover and the driving mechanism, stable connection of the hose is guaranteed, the axial direction of the output connector is movably limited between the pump cover and the driving mechanism, the output connector can move in a telescopic mode, and when the hose is squeezed, the generated deformation elongation has space release, so that the hose is prevented from being damaged. The water path backpressure is relieved, the pipe breaking risk is reduced, the reliability of the peristaltic pump is improved, and the service life of the peristaltic pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of peristaltic pumps, in particular to a highly reliable peristaltic pump. Background Art

[0002] A peristaltic pump is a pump that delivers fluid by squeezing a hose through the movement of a roller. Its working principle is similar to pinching a hose with fingers, and the fluid is pumped by alternately squeezing and releasing the pump's elastic delivery hose. In the prior art, the output connector of the hose of a peristaltic pump is fixedly connected to the pump cover. During operation, when the hose is elastically expanded or contracted, there is no space for elastic expansion and contraction release, resulting in pressure accumulation at the water outlet of the hose, and a high risk of tube breakage.

[0003] Therefore, it is necessary to provide a highly reliable peristaltic pump to solve the above technical problems. Utility Model Content

[0004] The utility model provides a highly reliable peristaltic pump to solve the problem of high risk of tube breakage in the peristaltic pump in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a highly reliable peristaltic pump, which includes: a driving mechanism, a pump cover, a roller assembly, and a hose;

[0006] The pump cover is fixedly connected to the driving mechanism, the roller assembly is rotatably arranged in the pump cover, the hose is arranged around the peripheral side of the roller assembly, and the hose is extruded between the peripheral side of the roller assembly and the inner wall of the pump cover, and the two ends of the hose are respectively connected to the input connector and the output connector, the axial direction of the input connector is fixedly limited between the pump cover and the driving mechanism, and the axial direction of the output connector is movably limited between the pump cover and the driving mechanism.

[0007] In the utility model, the driving mechanism includes a motor, a gear ring, a planetary gear and a driving gear, the gear ring is fixedly connected to the motor, the pump cover is fixedly connected to the gear ring, the output shaft of the motor extends into the gear ring, the driving gear is fixedly connected to the output shaft of the motor, and a plurality of the planetary gears are transmission-connected between the inner side of the gear ring and the driving gear;

[0008] The pump cover further includes an input cylinder body for accommodating the input joint and an output cylinder body for accommodating the output joint. An input limiting plate is provided on the circumferential side of the input joint, and an output limiting plate is provided on the circumferential side of the output joint. A first limiting groove for cooperating with the input limiting plate is provided on the inner wall of the input cylinder body, and the thickness of the input limiting plate is equal to the width corresponding to the first limiting groove. A second limiting groove for cooperating with the output limiting plate is provided on the inner wall of the output cylinder body, and the thickness of the output limiting plate is less than the width corresponding to the second limiting groove.

[0009] Wherein, a first through hole is formed between the port of the input cylinder body and the gear ring, and a second through hole is formed between the port of the output cylinder body and the gear ring. The input joint passes through the first through hole, and the output joint passes through the second through hole. A first baffle is provided on the circumferential side of the input joint, and the first baffle shields the outside of the first through hole. A second baffle is provided on the circumferential side of the input joint, and the second baffle shields the outside of the second through hole.

[0010] The outer diameter of the input joint is equal to the width of the first through hole, the outer diameter of the input joint is less than the length of the first through hole, the outer diameter of the first baffle is greater than the length and width of the first through hole, the outer diameter of the output joint is equal to the width of the second through hole, the outer diameter of the output joint is less than the length of the second through hole, and the outer diameter of the second baffle is greater than the length and width of the second through hole.

[0011] In addition, an arc surface is provided on the inner side wall of the pump cover corresponding to the circumference of the roller assembly. A first side wall connecting one end of the arc surface is provided in the input cylinder body, and a second side wall connecting the other end of the arc surface is provided in the output cylinder body. The first side wall intersects and connects with the arc surface, and the second side wall is tangentially connected with the arc surface.

[0012] In the present utility model, the pump cover and the gear ring are fixed by screws, and the screws are located at the position between the input joint and the output joint.

[0013] In the present utility model, buckle plates are provided on both sides of the pump cover, and the two buckle plates are respectively located on the sides of the input joint and the output joint away from each other. Fixing grooves for cooperating with the buckle plates are provided on both sides of the gear ring, and clamping blocks for clamping with the buckle plates are provided in the fixing grooves.

[0014] In the present utility model, the roller assembly includes a roller bracket and a roller rotatably arranged on the roller bracket. One end of the roller bracket is rotatably connected to the inner wall of the pump cover through the positioning shaft. The positioning shaft is a metal shaft. A connecting column is arranged at the other end of the roller bracket, and the connecting column is connected to the center of the planetary gear with a clearance fit.

[0015] Furthermore, the roller bracket includes an upper fixing plate, a lower fixing plate, and a cylindrical body part connected between the upper fixing plate and the lower fixing plate. The positioning shaft is connected inside the cylindrical body part, and the roller is rotatably arranged between the upper fixing plate and the lower fixing plate.

[0016] Furthermore, a reinforcing plate is also arranged between the upper fixing plate and the lower fixing plate. The reinforcing plate is simultaneously connected to the cylindrical body part. The connecting column is arranged on the lower fixing plate, and the position of the connecting column is opposite to the position of the reinforcing plate.

[0017] Furthermore, a reinforcing convex part is arranged on the inner wall of the pump cover. The positioning shaft is connected inside the reinforcing convex part, and an avoidance groove corresponding to the reinforcing convex part is arranged on the roller bracket.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: The axial direction of the input joint of the highly reliable peristaltic pump of the present utility model is fixedly restricted between the pump cover and the driving mechanism, ensuring the stable connection of the hose. The axial direction of the output joint is movably restricted between the pump cover and the driving mechanism, enabling the output joint to be telescopically movable. When the hose is squeezed, the generated deformation elongation amount has a space for release, relieving the waterway back pressure, reducing the risk of pipe breakage, improving the reliability of the peristaltic pump, and increasing the service life of the peristaltic pump. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings in the following description are only the corresponding drawings of some embodiments of the present utility model.

[0020] Figure 1 It is a schematic exploded view of the highly reliable peristaltic pump of the present utility model.

[0021] Figure 2 It is a vertical sectional view of the highly reliable peristaltic pump of the present utility model.

[0022] Figure 3 It is a horizontal sectional view of the highly reliable peristaltic pump of the present utility model. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0024] The directional terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", "top" and "bottom", etc., are only with reference to the orientation of the accompanying drawings. The directional terms used are for explaining and understanding the present utility model, rather than for limiting the present utility model.

[0025] The terms "first", "second", etc. in the terms of the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying relative importance, nor as a limitation on the sequence.

[0026] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, the connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the prior art, the output joint of the hose of the peristaltic pump is fixedly connected to the pump cover. During the working process, when the hose undergoes elastic expansion and contraction, there is no space for elastic expansion and contraction release, resulting in pressure accumulation at the water outlet end of the hose and a high risk of hose rupture.

[0028] The following is a preferred embodiment of a highly reliable peristaltic pump provided by the present utility model that can solve the above technical problems.

[0029] Please refer to Figure 1 , where Figure 1 is the exploded structural schematic diagram of the highly reliable peristaltic pump of the present utility model.

[0030] In the figure, the units with similar structures are denoted by the same reference numerals.

[0031] The present utility model provides a highly reliable peristaltic pump, which includes: a driving mechanism 11, a pump cover 12, a roller assembly, and a hose 16.

[0032] The pump cover 12 is fixedly connected to the driving mechanism 11, the roller assembly is rotatably arranged in the pump cover 12, the hose 16 is arranged around the peripheral side of the roller assembly, and the hose 16 is extruded and arranged between the peripheral side of the roller assembly and the inner wall of the pump cover 12, and the two ends of the hose 16 are respectively connected to the input connector 17 and the output connector 18, the axial direction of the input connector 17 is fixedly limited between the pump cover 12 and the driving mechanism 11, and the axial direction of the output connector 18 is movably limited between the pump cover 12 and the driving mechanism 11. The output connector 18 is retractable and movable, and when the hose 16 is squeezed, the deformation and elongation generated have space release, which relieves the back pressure of the water channel, reduces the risk of pipe breakage, improves the reliability of the peristaltic pump, and increases the life of the peristaltic pump.

[0033] In this embodiment, the driving mechanism 11 includes a motor (the reference numeral 11 also refers to a motor), a ring gear 111, planetary gears 112 and a driving gear 113. The ring gear 111 is fixedly connected to the motor, the pump cover 12 is fixedly connected to the ring gear 111, the output shaft of the motor extends into the ring gear 111, the driving gear 113 is fixedly connected to the output shaft of the motor, and a plurality of planetary gears 112 are transmission-connected between the inner side of the ring gear 111 and the driving gear 113.

[0034] The pump cover 12 in this embodiment further includes an input cylinder 121 for accommodating the input connector 17 , and an output cylinder 122 for accommodating the output connector 18 .

[0035] Please refer to Figure 1 and Figure 3 , an input limiting plate 171 is provided on the circumferential side of the input connector 17, an output limiting plate 181 is provided on the circumferential side of the output connector 18, a first limiting groove 1212 for cooperating with the input limiting plate 171 is provided on the inner wall of the input cylinder 121, the thickness of the input limiting plate 171 is equal to the width corresponding to the first limiting groove 1212, so that the first limiting groove 1212 can fix the axial movement of the input connector 17. A second limiting groove 1222 for cooperating with the output limiting plate 181 is provided on the inner wall of the output cylinder 122, the thickness of the output limiting plate 181 is less than the width corresponding to the second limiting groove 1222, so that the second limiting groove 1222 can provide space for the movement of the output connector 18, and has the function of specifically directional limiting the movement of the output connector 18.

[0036] Among them, a first through-hole is formed between the port of the input cylinder 121 and the gear ring (the position indicated by the label 1212 can also be referred to as the first through-hole), and a second through-hole is formed between the port of the output cylinder 122 and the gear ring (the position indicated by the label 1222 can also be referred to as the second through-hole). The input joint 17 passes through the first through-hole, and the output joint 18 passes through the second through-hole. A first baffle 172 is provided on the circumferential side of the input joint 17, and the first baffle 172 shields the outside of the first through-hole. A second baffle 182 is provided on the circumferential side of the input joint 17, and the second baffle 182 shields the outside of the second through-hole.

[0037] The outer diameter of the input joint 17 is equal to the width of the first through-hole, and the outer diameter of the input joint 17 is smaller than the length of the first through-hole (in the view orientation as shown, the vertical direction of the first through-hole is the length, and the horizontal direction is the width), so that there is a margin for movement when the input joint 17 is connected to an external device. The outer diameter of the first baffle 172 is larger than the length and width of the first through-hole, and the first baffle 172 can close the first through-hole. Figure 1 In the view orientation as shown, the vertical direction of the first through-hole is the length, and the horizontal direction is the width), so that there is a margin for movement when the input joint 17 is connected to an external device. The outer diameter of the first baffle 172 is larger than the length and width of the first through-hole, and the first baffle 172 can close the first through-hole.

[0038] The outer diameter of the output joint 18 is equal to the width of the second through-hole, and the outer diameter of the output joint 18 is smaller than the length of the second through-hole (in the view orientation as shown, the vertical direction of the second through-hole is the length, and the horizontal direction is the width), so that there is a margin for movement when the output joint 18 is connected to an external device. The outer diameter of the second baffle 182 is larger than the length and width of the second through-hole, and the second baffle 182 can close the second through-hole. Figure 1 In the view orientation as shown, the vertical direction of the second through-hole is the length, and the horizontal direction is the width), so that there is a margin for movement when the output joint 18 is connected to an external device. The outer diameter of the second baffle 182 is larger than the length and width of the second through-hole, and the second baffle 182 can close the second through-hole.

[0039] In this embodiment, the roller assembly includes a roller bracket 14 and a plurality of rollers 15 rotatably provided on the roller bracket 14. The rotation axes of the rollers 15 are parallel to the rotation axis of the roller bracket 14. The motor drives a plurality of planetary gears 112 to rotate, thereby driving the roller bracket 14 to rotate. The hose 16 is squeezed by the rollers 15, thereby pumping out the fluid.

[0040] One end of the roller bracket 14 is rotatably connected to the inner wall of the pump cover 12 through a positioning shaft 13. The positioning shaft 13 is a metal shaft, and the metal shaft can provide a strong positioning support force for the roller bracket 14. A connecting column 145 is provided at the other end of the roller bracket 14. The connecting column 145 is connected to the center of the planetary gear 112 with a clearance fit. Only transmission occurs between the roller bracket 14 and the planetary gear 112, without a positioning effect, reducing assembly and installation, improving assembly accuracy, not prone to yaw, reducing vibration and abnormal noise during operation, and improving the stability of the peristaltic pump.

[0041] The inner wall of the pump cover in the prior art has a rounded corner near the output joint of the hose. The hose pipeline will contact the rounded corner and be bent, increasing the back pressure of the water circuit and the risk of pipe rupture. In this embodiment, an arc surface 125 is provided on the inner side wall of the pump cover corresponding to the movement tracks of the plurality of rollers 15. A first side wall 1211 connecting one end of the arc surface 125 is provided in the input cylinder 121, and a second side wall 1221 connecting the other end of the arc surface 125 is provided in the output cylinder 122. The first side wall 1211 intersects and connects with the arc surface 125 to improve the pumping force of the roller 15 pressing the hose 16, such as Figure 3 at B in Figure 3 . The second side wall 1221 is tangentially connected to the arc surface 125, such as at A in

[0042] , which can reduce the bending of the hose 16 on the inner wall of the pump cover 12, reduce the back pressure of the water circuit, lower the risk of pipe rupture, and improve the reliability of the peristaltic pump.

[0043] In this embodiment, the pump cover 12 and the gear ring 111 are fixed by screws 19, and the screws 19 are located at the position between the input joint 17 and the output joint 18.

[0044] Please refer to Figure 1 and Figure 2 , where the roller bracket 14 includes an upper fixing plate 141, a lower fixing plate 142, and a cylinder part 143 connected between the upper fixing plate 141 and the lower fixing plate 142. The positioning shaft 13 is connected in the cylinder part 143, and the roller 15 is rotatably arranged between the upper fixing plate 141 and the lower fixing plate 142.

[0045] Furthermore, a reinforcing plate 144 is also provided between the upper fixing plate 141 and the lower fixing plate 142. The reinforcing plate 144 is simultaneously connected to the cylinder part 143. A connecting column 145 is provided on the lower fixing plate 142, and the position of the connecting column 145 is opposite to the position of the reinforcing plate 144, so the structure is very stable.

[0046] In this embodiment, the upper fixing plate 141, the lower fixing plate 142, the cylinder part 143, the reinforcing plate 144, and the connecting column 145 are of an integrally formed structure, with a stable structure and few assemblies.

[0047] Figure 2 Please refer to Figure 2, in this embodiment, a reinforcing protrusion 124 is provided on the inner wall of the pump cover 12, the positioning shaft 13 is connected within the reinforcing protrusion 124, and an avoidance groove 146 corresponding to the reinforcing protrusion 124 is provided on the roller bracket 14, so that the connection between the positioning shaft 13 and the pump cover 12 is very stable, and the strength of the connection part is high.

[0048] In this embodiment, the axial direction of the input joint of the highly reliable peristaltic pump is fixedly restricted between the pump cover and the driving mechanism to ensure the stable connection of the hose. The axial direction of the output joint is movably restricted between the pump cover and the driving mechanism, so that the output joint can telescopically move. When the hose is squeezed, the generated deformation elongation has a space for release, relieving the waterway back pressure, reducing the risk of pipe rupture, improving the reliability of the peristaltic pump, and increasing the service life of the peristaltic pump.

[0049] In addition, the positioning shaft is set as a metal shaft to improve the positioning support force. The roller bracket and the planetary gear are connected with a clearance fit, only for transmission and without a positioning effect, reducing assembly and installation, improving the assembly accuracy, not prone to yaw, reducing vibration and abnormal noise during operation, improving the stability of the peristaltic pump, and increasing the service life of the peristaltic pump.

[0050] In summary, although the present utility model has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present utility model. Those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model is subject to the scope defined by the claims.

Claims

1. A highly reliable peristaltic pump, characterized in that: include: drive mechanism, pump cover, roller assembly, and hose; The pump cover is fixedly connected to the driving mechanism, the roller assembly is rotatably arranged in the pump cover, the hose is arranged around the peripheral side of the roller assembly, and the hose is extruded between the peripheral side of the roller assembly and the inner wall of the pump cover, and the two ends of the hose are respectively connected to the input connector and the output connector, the axial direction of the input connector is fixedly limited between the pump cover and the driving mechanism, and the axial direction of the output connector is movably limited between the pump cover and the driving mechanism.

2. The highly reliable peristaltic pump according to claim 1, characterized in that: The driving mechanism comprises a motor, a gear ring, a planetary gear and a driving gear, wherein the gear ring is fixedly connected to the motor, the pump cover is fixedly connected to the gear ring, the output shaft of the motor extends into the gear ring, the driving gear is fixedly connected to the output shaft of the motor, and a plurality of the planetary gears are drivingly connected between the inner side of the gear ring and the driving gear; The pump cover also includes an input cylinder for accommodating the input connector, and an output cylinder for accommodating the output connector, an input limit plate is provided on the circumferential side of the input connector, an output limit plate is provided on the circumferential side of the output connector, a first limit groove for cooperating with the input limit plate is provided on the inner wall of the input cylinder, the thickness of the input limit plate is equal to the width corresponding to the first limit groove, a second limit groove for cooperating with the output limit plate is provided on the inner wall of the output cylinder, the thickness of the output limit plate is less than the width corresponding to the second limit groove.

3. The highly reliable peristaltic pump according to claim 2, characterized in that: A first through-out port is formed between the port of the input cylinder and the gear ring, a second through-out port is formed between the port of the output cylinder and the gear ring, the input connector passes through the first through-out port, the output connector passes through the second through-out port, a first baffle is provided on the circumferential side of the input connector, the first baffle blocks the outside of the first through-out port, a second baffle is provided on the circumferential side of the input connector, the second baffle blocks the outside of the second through-out port; The outer diameter of the input connector is equal to the width of the first through-port, the outer diameter of the input connector is smaller than the length of the first through-port, the outer diameter of the first baffle is larger than the length and width of the first through-port, the outer diameter of the output connector is equal to the width of the second through-port, the outer diameter of the output connector is smaller than the length of the second through-port, and the outer diameter of the second baffle is larger than the length and width of the second through-port.

4. The highly reliable peristaltic pump according to claim 2, characterized in that: The inner wall of the pump cover is provided with an arc surface corresponding to the circumference of the roller assembly, the input cylinder is provided with a first side wall connected to one end of the arc surface, the output cylinder is provided with a second side wall connected to the other end of the arc surface, the first side wall intersects and is connected to the arc surface, and the second side wall is tangently connected to the arc surface.

5. The highly reliable peristaltic pump according to claim 2, characterized in that: The pump cover and the gear ring are fixed by screws, and the screws are located between the input connector and the output connector.

6. The highly reliable peristaltic pump according to claim 2, characterized in that: Snap plates are arranged on both sides of the pump cover, and the two snap plates are respectively located on the side where the input connector and the output connector are away from each other. Fixing grooves cooperating with the snap plates are arranged on both sides of the gear ring, and clamping blocks for clamping with the snap plates are arranged in the fixing grooves.

7. The high-reliability peristaltic pump according to claim 2, characterized in that: The roller assembly includes a roller bracket and a roller rotatably arranged on the roller bracket. One end of the roller bracket is rotatably connected to the inner wall of the pump cover via a positioning shaft. The positioning shaft is a metal shaft. A connecting column is arranged at the other end of the roller bracket. The connecting column is connected to the center of the planetary gear in a clearance fit.

8. The high-reliability peristaltic pump according to claim 7, characterized in that: The roller bracket includes an upper fixing plate, a lower fixing plate and a barrel portion connected between the upper fixing plate and the lower fixing plate, the positioning shaft is connected in the barrel portion, and the roller is rotatably arranged between the upper fixing plate and the lower fixing plate.

9. The high-reliability peristaltic pump according to claim 8, characterized in that: A reinforcing plate is further arranged between the upper fixing plate and the lower fixing plate, and the reinforcing plate is connected to the cylinder portion at the same time. The connecting column is arranged on the lower fixing plate, and the position of the connecting column is opposite to the position of the reinforcing plate.

10. The high-reliability peristaltic pump according to claim 7, characterized in that: A reinforcement convex portion is arranged on the inner wall of the pump cover, the positioning shaft is connected inside the reinforcement convex portion, and a avoidance groove corresponding to the reinforcement convex portion is arranged on the roller bracket.

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